Class 12 Exam > Class 12 Questions > Directions : In the following questions, A s...
Start Learning for Free
Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.
Assertion (A): Photoelectric effect demonstrates the particle nature of light.
Reason (R): The number of photoelectrons is proportional to the frequency of light.
- a)Both A and R are true and R is the correct explanation of A
- b)Both A and R are true but R is NOT the correct explanation of A
- c)A is true but R is false
- d)A is false and R is true
Correct answer is option 'C'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
Directions : In the following questions, A statement of Assertion (A)...
Photoelectric effect demonstrates the particle nature of light. So the assertion is true.
View all questions of this test
Number of emitted photoelectrons depends upon the intensity of light. So the reason is false.
Most Upvoted Answer
Directions : In the following questions, A statement of Assertion (A)...
**Assertion (A):** Photoelectric effect demonstrates the particle nature of light.
**Reason (R):** The number of photoelectrons is proportional to the frequency of light.
The correct answer is option 'C': A is true but R is false.
**Explanation:**
The photoelectric effect is a phenomenon in which electrons are emitted from a material's surface when it is exposed to light. This effect cannot be explained by classical wave theory but can be explained by the particle nature of light, as proposed by Albert Einstein.
**Particle Nature of Light:**
According to the particle nature of light, light is made up of discrete packets of energy called photons. Each photon carries a specific amount of energy, which is directly proportional to its frequency.
**Explanation of Assertion (A):**
The statement that the photoelectric effect demonstrates the particle nature of light is true. When light interacts with a material's surface, it transfers its energy to the electrons in the material. This energy transfer occurs in discrete packets or photons. The electrons can only absorb energy from photons if the energy of the photons matches or exceeds the energy required to overcome the binding energy of the electrons in the material. If the energy of the incident photons is below this threshold, no electrons will be emitted.
The photoelectric effect confirms the particle nature of light because it shows that light behaves as discrete packets of energy (photons) rather than a continuous wave.
**Explanation of Reason (R):**
The statement that the number of photoelectrons is proportional to the frequency of light is false. In the photoelectric effect, the number of photoelectrons emitted depends on the intensity (brightness) of the incident light, not its frequency.
The energy of the incident photons is directly proportional to their frequency, but the number of photons (intensity) is not directly related to frequency. Therefore, the number of photoelectrons emitted is determined by the intensity of light, not its frequency.
Hence, the reason (R) is false.
In conclusion, Assertion (A) is true as the photoelectric effect demonstrates the particle nature of light, while Reason (R) is false as the number of photoelectrons is not proportional to the frequency of light.
**Reason (R):** The number of photoelectrons is proportional to the frequency of light.
The correct answer is option 'C': A is true but R is false.
**Explanation:**
The photoelectric effect is a phenomenon in which electrons are emitted from a material's surface when it is exposed to light. This effect cannot be explained by classical wave theory but can be explained by the particle nature of light, as proposed by Albert Einstein.
**Particle Nature of Light:**
According to the particle nature of light, light is made up of discrete packets of energy called photons. Each photon carries a specific amount of energy, which is directly proportional to its frequency.
**Explanation of Assertion (A):**
The statement that the photoelectric effect demonstrates the particle nature of light is true. When light interacts with a material's surface, it transfers its energy to the electrons in the material. This energy transfer occurs in discrete packets or photons. The electrons can only absorb energy from photons if the energy of the photons matches or exceeds the energy required to overcome the binding energy of the electrons in the material. If the energy of the incident photons is below this threshold, no electrons will be emitted.
The photoelectric effect confirms the particle nature of light because it shows that light behaves as discrete packets of energy (photons) rather than a continuous wave.
**Explanation of Reason (R):**
The statement that the number of photoelectrons is proportional to the frequency of light is false. In the photoelectric effect, the number of photoelectrons emitted depends on the intensity (brightness) of the incident light, not its frequency.
The energy of the incident photons is directly proportional to their frequency, but the number of photons (intensity) is not directly related to frequency. Therefore, the number of photoelectrons emitted is determined by the intensity of light, not its frequency.
Hence, the reason (R) is false.
In conclusion, Assertion (A) is true as the photoelectric effect demonstrates the particle nature of light, while Reason (R) is false as the number of photoelectrons is not proportional to the frequency of light.
|
Explore Courses for Class 12 exam
|
|
Similar Class 12 Doubts
Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.Assertion (A): Photoelectric effect demonstrates the particle nature of light.Reason (R): The number of photoelectrons is proportional to the frequency of light.a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false and R is trueCorrect answer is option 'C'. Can you explain this answer?
Question Description
Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.Assertion (A): Photoelectric effect demonstrates the particle nature of light.Reason (R): The number of photoelectrons is proportional to the frequency of light.a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false and R is trueCorrect answer is option 'C'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.Assertion (A): Photoelectric effect demonstrates the particle nature of light.Reason (R): The number of photoelectrons is proportional to the frequency of light.a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false and R is trueCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.Assertion (A): Photoelectric effect demonstrates the particle nature of light.Reason (R): The number of photoelectrons is proportional to the frequency of light.a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false and R is trueCorrect answer is option 'C'. Can you explain this answer?.
Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.Assertion (A): Photoelectric effect demonstrates the particle nature of light.Reason (R): The number of photoelectrons is proportional to the frequency of light.a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false and R is trueCorrect answer is option 'C'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.Assertion (A): Photoelectric effect demonstrates the particle nature of light.Reason (R): The number of photoelectrons is proportional to the frequency of light.a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false and R is trueCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.Assertion (A): Photoelectric effect demonstrates the particle nature of light.Reason (R): The number of photoelectrons is proportional to the frequency of light.a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false and R is trueCorrect answer is option 'C'. Can you explain this answer?.
Solutions for Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.Assertion (A): Photoelectric effect demonstrates the particle nature of light.Reason (R): The number of photoelectrons is proportional to the frequency of light.a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false and R is trueCorrect answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 12.
Download more important topics, notes, lectures and mock test series for Class 12 Exam by signing up for free.
Here you can find the meaning of Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.Assertion (A): Photoelectric effect demonstrates the particle nature of light.Reason (R): The number of photoelectrons is proportional to the frequency of light.a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false and R is trueCorrect answer is option 'C'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.Assertion (A): Photoelectric effect demonstrates the particle nature of light.Reason (R): The number of photoelectrons is proportional to the frequency of light.a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false and R is trueCorrect answer is option 'C'. Can you explain this answer?, a detailed solution for Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.Assertion (A): Photoelectric effect demonstrates the particle nature of light.Reason (R): The number of photoelectrons is proportional to the frequency of light.a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false and R is trueCorrect answer is option 'C'. Can you explain this answer? has been provided alongside types of Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.Assertion (A): Photoelectric effect demonstrates the particle nature of light.Reason (R): The number of photoelectrons is proportional to the frequency of light.a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false and R is trueCorrect answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.Assertion (A): Photoelectric effect demonstrates the particle nature of light.Reason (R): The number of photoelectrons is proportional to the frequency of light.a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false and R is trueCorrect answer is option 'C'. Can you explain this answer? tests, examples and also practice Class 12 tests.
|
|
Explore Courses for Class 12 exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup