Question

a blue lamp mainly emits light of 4500A° wavelength.the lamp is considered to be 150w&8% of the energy is emitted as visible light. the no. of photons emitted per second by the lamp will be​

Answer 1

Answer:

Number of photons emitted per second

=

E

8%ofP

=

100hc

8Pλ

=

100×6.63×10

−34

×3×10

8

8×150×4500×10

−10

=3 × 10^19