Home
Class 12
PHYSICS
Light from the sun arrives at the earth,...

Light from the sun arrives at the earth, an average of `1.5 xx 10 ^(11)` away, at the rate of `1.4 xx 10^(3) W//m^(2)` of area perpendicular to the direction of the light. Assuming that sunlight is monochromatic with a frequency of `5xx 10 ^(14) Hz,` the number of photons falling per second on each square meter of the earth's surface directly facing the sun is :

A

`8.4 xx 10 ^(6) "photons/m"^(2)`

B

`3.0 xx 10 ^(18)"photons/m"^(2)`

C

`6.7 xx 10 ^(20)"photons/m"^(2)`

D

`4.2xx 10 ^(21)"photons/m"^(2)`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Similar Questions

Explore conceptually related problems

Find the number of photons emitted per second by a 25 W source of monochromatic light of wavelength 6000 oversetcircA .

What is the energy content per photon (J) for light of frequency 4.2xx10^(14) Hz?

To which part of electromagnetic spectrum does a wave of frequency 5 xx 10^(11) Hz belong?

The work function of caesium metal is 2.14 eV. When light of frequency 6 xx 10^14 Hz is incident on the metal surface, photomission of electrons occurs. What is the stopping potential.

Calculate the momentum of a photon of green light its frequency v=6 xx10^(14) Hertz (Hz) moving through the free space.

The work function of caesium metal is 2.14 eV. When light of frequency 6 xx 10^14 Hz is incident on the metal surface, photomission of electrons occurs. What is the maximum kinectic energy of the emitted electrons.

The work function of caesium metal is 2.14 eV. When light of frequency 6 xx 10^14 Hz is incident on the metal surface, photomission of electrons occurs. What is the maximum speed of the emitted photoelectrons?