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The work function of sodium metal is 4.41 × 10-19 J. If photons of wavelength 300 nm are incident on the metal, the kinetic energy of the ejected electrons will be (h = 6.63 × 10-34 J s; c = 3 × 108 m/s) ________ × 10-21 J. (Nearest integer)
Correct answer is '222'. Can you explain this answer?
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The work function of sodium metal is 4.41 × 10-19J. If photons o...
w, work function of sodium metal = 4.41 × 10-19 J
λ, wavelength of the incident light = 300 nm = 3 × 10-7 m
According to photoelectric effect,
6.63 × 10-19 = 4.41 × 10-19 + KE
KE = 2.22 × 10-19 J = 222 × 10-21 J
λ, wavelength of the incident light = 300 nm = 3 × 10-7 m
According to photoelectric effect,
6.63 × 10-19 = 4.41 × 10-19 + KE
KE = 2.22 × 10-19 J = 222 × 10-21 J
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The work function of sodium metal is 4.41 × 10-19J. If photons o...
- **Given data:**
- Work function of sodium metal (Φ) = 4.41 × 10^-19 J
- Wavelength of incident photons (λ) = 300 nm = 300 × 10^-9 m
- Planck's constant (h) = 6.63 × 10^-34 J s
- Speed of light (c) = 3 × 10^8 m/s
- **Calculations:**
- Energy of incident photons (E) = hc/λ
= (6.63 × 10^-34 J s × 3 × 10^8 m/s) / (300 × 10^-9 m)
= 6.63 × 3
= 19.89 × 10^-19 J
- Kinetic energy of ejected electrons (K.E.) = E - Φ
= 19.89 × 10^-19 J - 4.41 × 10^-19 J
= 15.48 × 10^-19 J
= 1.548 × 10^-18 J
- **Final answer:**
- The kinetic energy of the ejected electrons will be approximately 1.548 × 10^-18 J, which is closest to 222 × 10^-21 J when rounded to the nearest integer.
- Work function of sodium metal (Φ) = 4.41 × 10^-19 J
- Wavelength of incident photons (λ) = 300 nm = 300 × 10^-9 m
- Planck's constant (h) = 6.63 × 10^-34 J s
- Speed of light (c) = 3 × 10^8 m/s
- **Calculations:**
- Energy of incident photons (E) = hc/λ
= (6.63 × 10^-34 J s × 3 × 10^8 m/s) / (300 × 10^-9 m)
= 6.63 × 3
= 19.89 × 10^-19 J
- Kinetic energy of ejected electrons (K.E.) = E - Φ
= 19.89 × 10^-19 J - 4.41 × 10^-19 J
= 15.48 × 10^-19 J
= 1.548 × 10^-18 J
- **Final answer:**
- The kinetic energy of the ejected electrons will be approximately 1.548 × 10^-18 J, which is closest to 222 × 10^-21 J when rounded to the nearest integer.
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The work function of sodium metal is 4.41 × 10-19J. If photons of wavelength 300 nm are incident on the metal, the kinetic energy of the ejected electrons will be (h = 6.63 × 10-34J s; c = 3 × 108m/s) ________ × 10-21J. (Nearest integer)Correct answer is '222'. Can you explain this answer?
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The work function of sodium metal is 4.41 × 10-19J. If photons of wavelength 300 nm are incident on the metal, the kinetic energy of the ejected electrons will be (h = 6.63 × 10-34J s; c = 3 × 108m/s) ________ × 10-21J. (Nearest integer)Correct answer is '222'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about The work function of sodium metal is 4.41 × 10-19J. If photons of wavelength 300 nm are incident on the metal, the kinetic energy of the ejected electrons will be (h = 6.63 × 10-34J s; c = 3 × 108m/s) ________ × 10-21J. (Nearest integer)Correct answer is '222'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The work function of sodium metal is 4.41 × 10-19J. If photons of wavelength 300 nm are incident on the metal, the kinetic energy of the ejected electrons will be (h = 6.63 × 10-34J s; c = 3 × 108m/s) ________ × 10-21J. (Nearest integer)Correct answer is '222'. Can you explain this answer?.
The work function of sodium metal is 4.41 × 10-19J. If photons of wavelength 300 nm are incident on the metal, the kinetic energy of the ejected electrons will be (h = 6.63 × 10-34J s; c = 3 × 108m/s) ________ × 10-21J. (Nearest integer)Correct answer is '222'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about The work function of sodium metal is 4.41 × 10-19J. If photons of wavelength 300 nm are incident on the metal, the kinetic energy of the ejected electrons will be (h = 6.63 × 10-34J s; c = 3 × 108m/s) ________ × 10-21J. (Nearest integer)Correct answer is '222'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The work function of sodium metal is 4.41 × 10-19J. If photons of wavelength 300 nm are incident on the metal, the kinetic energy of the ejected electrons will be (h = 6.63 × 10-34J s; c = 3 × 108m/s) ________ × 10-21J. (Nearest integer)Correct answer is '222'. Can you explain this answer?.
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