Monochromatic light of frequency 6.0 x 10¹⁴ Hz is produced by a laser. The power emitted

Monochromatic light of frequency 6.0 x 10¹⁴ Hz is produced by a laser. The power emitted is 2 x 10⁻³ ?. The number of photons emitted, on the average, by the sources per second is

Options

(a) 5 x 10¹⁶
(b) 5 x 10¹⁷
(c) 5 x 10¹⁴
(d) 5 x 10¹⁵

Correct Answer:

5 x 10¹⁵

Explanation:

Since P = nhv
n = p/hv = 2 x 10⁻³ / 6.6 x 10⁻³⁴ x 6.0 x 10¹⁴
= 5 x 10¹⁵

admin:

Related Questions

  1. Six molecules have speeds 2 units, 5 units, 3 units, 6 units, 3 units and 5 units
  2. Which one of the following electrical meter has the smallest resistance?
  3. The dual nature of light is exhibited by
  4. Which one of the following statements is not correct in case of a semiconductor?
  5. The de-Broglie wavelength of a proton(charge = 1.6 x 10⁻¹⁹ C, Mass = 1.6 x 10⁻²⁷ kg)