The number of photons of wavelength of 540 nm emitted per second by an electric bulb

The Number Of Photons Of Wavelength Of 540 Nm Emitted Physics QuestionThe Number Of Photons Of Wavelength Of 540 Nm Emitted Physics Question

The number of photons of wavelength of 540 nm emitted per second by an electric bulb of power 100 W is (given h=6×10⁻³⁴ J-s)

Options

(a) 100
(b) 1000
(c) 3×10²⁰
(d) 3×10¹⁸

Correct Answer:

3×10²⁰

Explanation:

Power = nhc / ( × t)

⇒ 100 = [n × (6 × 10⁻³⁴) × (3 × 10⁸)] / (540 × 10⁹ × 1)

⇒ n × 18 × 10⁻²⁶ / 540 × 10⁻⁹ = 100

⇒ n = 100 × 540 × 10⁻⁹ / 18 × 10⁻²⁶ = 3 x 10²⁰

AddThis Website Tools
KL2002
admin:

Related Questions

  1. A thin wire of length L and mass M is bent to form a semicircle.
  2. A black body is at 727⁰C. It emits energy at a rate which is proportional to
  3. Which one of the following electrical meter has the smallest resistance?
  4. Huygen’s principle of secondary wavelets may be used to
  5. Two resistors of 6Ω and 9Ω are connected in series to a 120 V source.