Question

A 400 Watt bulb emits mono chromatic light wavelength of 400nm. ​

Answer 1

Answer:

N = 2×10^20 photons

● Explanation -

Energy of isolated photon is calculated by -

E = hc/λ

E = (6.63×10^-34 × 3×10^8) / (4×10^-7)

E = 4.97×10^-19 J

No of photons emitted per unit time is calculated by -

N = P / E

N = 100 / (4.97×10^-19 J)

N = 2×10^20 photons

Read more on Brainly.in - https://brainly.in/question/1416905#readmore