Question

a bulb emits light of wavelength 6600 angstrom. the bulb is rated as 200 watt and 10% of energy is emitted as light. how many photons are emitted by the bulb per second

Answer 1

Answer:

all are same only number are change on some places

Explanation:

Energy emitted per second by the bulb =150×

100

8

J

Energy of 1 photon =

λ

hc

=

4500×10

−10

6.626×10

−34

×3×10

8

=4.42×10

−19

joule

Let n photons be evolved per second.

∴n×4.42×10

−19

=150×

100

8

n=27.2×10

18

.