Question

# In Einstein's explanation of the photoelectric effect, he guessed that light—electromagnetic waves—can be thought of as...

In Einstein's explanation of the photoelectric effect, he guessed that light—electromagnetic waves—can be thought of as being made up of particles he called "photon", with each particle having energy E = h f , where h is Planck's constant ( h = 6.626 × 10 − 34 J ⋅ s ) and f is the frequency of light. Compute the energy of a single photon associated with following electromagnetic waves.

The energy of photon for a 97-MHz FM radio wave is_____________ × 10 − 25 J .

The energy of photon for a 530-nm visible light is_____________ × 10 − 18 J .

The energy of photon for a 120-nm ultraviolet radiation is______________ × 10 − 18 J .

Energy E = hf

where h is the Plank's constant = Js

and f is the frequency.

(a) f = 97MHz = Hz

E = hf = = =

(b) Wavelength

we have, frequency

where c is the velocity of light =

Therefore , E = hf =

=

=

(c)

Energy ,

#### Earn Coins

Coins can be redeemed for fabulous gifts.