Question

Two laser beams one of wave length 640 nm and the other 400 nm have same unit flux of photons. Their powers are in the ratio??

Answer 1

Answer:

1:1

Explanation:

AS THEY HAVE SAME UNIT FLUX OF PHOTONS,SO THEIR POWERS ARE IN RATIO 1:1

Answer 2

Answer:

The ratio of the powers is 64:169

Explanation:

TO find:

       Ratio of power.

Given:

    Wave length of one laser beam is 640 nm

     The wave length of other lase beam is 400 nm

      And two laser beams have same unit of flux of photos .

     The  powers are in the ratio of

                    p∝1/λ^2

                  $\frac{P1}{P2}$=(λ2)^2/(λ1)^2

                      $\frac{P1}{P2}=\frac{400^{2} }{650^{2} } \\ \frac{P1}{P2}=\frac{64}{169}$

The ratio of the powers is 64:169

The project code is #SPJ2