Question

1 milliwatt laser source is emitting light of wavelength 555 nm .The number of photons emitted per second ​

Answer 1

Answer:

hey

Explanation:

A laser pointer typically has a power rating of 1 mW, or 0.001 Joules per second. This means that every second a laser pointer emits a number of photons equal to (3.2x1018photons/J)(0.001J/s) = 3.2x1015 photons/s.

Hope this helps:)

Answer 2

Explanation:

Given 1 milli watt laser source is emitting light of wavelength 555 nm .The number of photons emitted per second  

• We need to find the number of photons emitted per second.
• So we have E = hc / λ
•                       = 6.6 x 10^-34 x 3 x 10^8 m/s / 555 x 10^-9
•             = 3.56 x 10^-19 Joules
• Now number of photons per second = I / E (I = intensity)
•                                                 = 1 x 10^-3 joule / sec / 3.56 x 10^-19 joule
•                                                             = 0.2808 x 10^16 / sec

Reference link will be

https://brainly.in/question/1241821