All Courses
Explore Courses UPSC Exam UPSC Test Series Free Notes EduRev Infinity Get the App Login Join for Free
Sign in Open App
NEET Exam  >  NEET Questions  >  Light of wavelength (L) shines on a metal sur... Start Learning for Free
SaveJoin the Discussion on the App
Light of wavelength (L) shines on a metal surface with intensity (x) and the metal emits (y) electrons per second of average energy (z). What will happen to (y) and (z) if (x) is doubled.?. A) y will be doubled and z will become half. B) y will remain same and z will be doubled. C) both y and z will be doubled. D) y will be doubled but z will remain same.?
Clear all your NEET doubts with EduRev
Most Upvoted Answer
Light of wavelength (L) shines on a metal surface with intensity (x) a...
Effect of doubling intensity of light on emission of electrons and their average energy

Possible answer:

When the intensity of light shining on a metal surface is doubled, it will cause more photons to hit the surface and excite more electrons to higher energy levels. This may increase the kinetic energy of the electrons and some may overcome the work function of the metal and be emitted as photoelectrons. The rate of emission of electrons (y) will depend on the number of photons that can cause this effect, which is proportional to the intensity of light (x).

However, the average energy (z) of the emitted electrons will depend on the energy distribution of the electrons in the metal and the work function of the metal. Increasing the intensity of light will not change these parameters, so the average energy of the emitted electrons will remain the same.

Therefore, the correct answer is D) y will be doubled but z will remain the same.

To summarize:

Impact of doubling light intensity on photoelectric effect:

- More photons hit the metal surface
- More electrons may be excited to a higher energy level
- Some electrons may be emitted as photoelectrons
- Rate of emission (y) will increase proportionally to the intensity (x)

Impact of doubling light intensity on average energy of photoelectrons:

- Energy distribution of electrons in metal and work function of metal determine the maximum kinetic energy of emitted electrons
- Increasing the intensity of light does not change these parameters
- Average energy (z) of emitted electrons will remain the same.
Community Answer
Light of wavelength (L) shines on a metal surface with intensity (x) a...
Since energy of emitted electrons doesn't depends on intensity (x) but number of photoelectrons emitted depends on intensity, that is, it's directly proportional to intensity. So if X is doubled Y will be doubled but Z will remain constant. answer is D.
Attention NEET Students!
To make sure you are not studying endlessly, EduRev has designed NEET study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in NEET.
Explore Courses for NEET exam

Similar NEET Doubts

Read the following text and answer the following questions on the basis of the same:Electron Microscope Electron microscopes use electrons to illuminate a sample. In Transmission Electron Microscopy (TEM), electrons pass through the sample and illuminate film or a digital camera.Resolution in microscopy is limited to about half of the wavelength of the illumination source used to image the sample. Using visible light the best resolution that can be achieved by microscopes is about ~200 nm. Louis de Broglie showed that every particle or matter propagates like a wave. The wavelength of propagating electrons at a given accelerating voltage can be determined byThus, the wavelength of electrons is calculated to be 3.88 pm when the microscope is operated at 100 keV, 2. 74 pm at 200 keV and 2.24 pm at 300 keV. However, because the velocities of electrons in an electron microscope reach about 70% the speed of light with an accelerating voltage of 200 keV, there are relativistic effects on these electrons. Due to this effect, the wavelength at 100 keV, 200 keV and 300 keV in electron microscopes is 3.70 pm, 2.51 pm and 1.96 pm, respectively.Anyhow, the wavelength of electrons is much smaller than that of photons (2.5 pm at 200 keV). Thus if electron wave is used to illuminate the sample, the resolution of an electron microscope theoretically becomes unlimited. Practically, the resolution is limited to ~0.1 nm due to the objective lens system in electron microscopes. Thus, electron microscopy can resolve subcellular structures that could not be visualized using standard fluorescence microscopy.Q. Wavelength of electron as wave at accelerating voltage 200 keV is

Top Courses for NEETView all

Top Courses for NEET

Light of wavelength (L) shines on a metal surface with intensity (x) and the metal emits (y) electrons per second of average energy (z). What will happen to (y) and (z) if (x) is doubled.?. A) y will be doubled and z will become half. B) y will remain same and z will be doubled. C) both y and z will be doubled. D) y will be doubled but z will remain same.?
Question Description
Light of wavelength (L) shines on a metal surface with intensity (x) and the metal emits (y) electrons per second of average energy (z). What will happen to (y) and (z) if (x) is doubled.?. A) y will be doubled and z will become half. B) y will remain same and z will be doubled. C) both y and z will be doubled. D) y will be doubled but z will remain same.? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Light of wavelength (L) shines on a metal surface with intensity (x) and the metal emits (y) electrons per second of average energy (z). What will happen to (y) and (z) if (x) is doubled.?. A) y will be doubled and z will become half. B) y will remain same and z will be doubled. C) both y and z will be doubled. D) y will be doubled but z will remain same.? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Light of wavelength (L) shines on a metal surface with intensity (x) and the metal emits (y) electrons per second of average energy (z). What will happen to (y) and (z) if (x) is doubled.?. A) y will be doubled and z will become half. B) y will remain same and z will be doubled. C) both y and z will be doubled. D) y will be doubled but z will remain same.?.
Solutions for Light of wavelength (L) shines on a metal surface with intensity (x) and the metal emits (y) electrons per second of average energy (z). What will happen to (y) and (z) if (x) is doubled.?. A) y will be doubled and z will become half. B) y will remain same and z will be doubled. C) both y and z will be doubled. D) y will be doubled but z will remain same.? in English & in Hindi are available as part of our courses for NEET. Download more important topics, notes, lectures and mock test series for NEET Exam by signing up for free.
Here you can find the meaning of Light of wavelength (L) shines on a metal surface with intensity (x) and the metal emits (y) electrons per second of average energy (z). What will happen to (y) and (z) if (x) is doubled.?. A) y will be doubled and z will become half. B) y will remain same and z will be doubled. C) both y and z will be doubled. D) y will be doubled but z will remain same.? defined & explained in the simplest way possible. Besides giving the explanation of Light of wavelength (L) shines on a metal surface with intensity (x) and the metal emits (y) electrons per second of average energy (z). What will happen to (y) and (z) if (x) is doubled.?. A) y will be doubled and z will become half. B) y will remain same and z will be doubled. C) both y and z will be doubled. D) y will be doubled but z will remain same.?, a detailed solution for Light of wavelength (L) shines on a metal surface with intensity (x) and the metal emits (y) electrons per second of average energy (z). What will happen to (y) and (z) if (x) is doubled.?. A) y will be doubled and z will become half. B) y will remain same and z will be doubled. C) both y and z will be doubled. D) y will be doubled but z will remain same.? has been provided alongside types of Light of wavelength (L) shines on a metal surface with intensity (x) and the metal emits (y) electrons per second of average energy (z). What will happen to (y) and (z) if (x) is doubled.?. A) y will be doubled and z will become half. B) y will remain same and z will be doubled. C) both y and z will be doubled. D) y will be doubled but z will remain same.? theory, EduRev gives you an ample number of questions to practice Light of wavelength (L) shines on a metal surface with intensity (x) and the metal emits (y) electrons per second of average energy (z). What will happen to (y) and (z) if (x) is doubled.?. A) y will be doubled and z will become half. B) y will remain same and z will be doubled. C) both y and z will be doubled. D) y will be doubled but z will remain same.? tests, examples and also practice NEET tests.
Explore Courses for NEET exam

Top Courses for NEET

Explore Courses

Suggested Free Tests

Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev
Get App
© EduRev
Education Revolution
Follow Us
Signup to see your scores go up
within 7 days!
Takes less than 10 seconds to signup