Home
Class 12
PHYSICS
A monochromatic source emitting light of...

A monochromatic source emitting light of wavelength 600 nm has a power output of 66 W. Calculate the number of photons emitted by this source in 2 minutes.

Text Solution

Verified by Experts

Energy of one photon `E=(hc)/(lambda)`
`E=(6.6xx10^(-34)xx3xx10^(8))/(6xx10^(-7))`
`E=3.3xx10^(-19)J`
No. of electron emitted per second
`n=(P)/(E )=(66)/(3.3 xx 10^(-19) =2xx10^(20)`
No. of photons emitted in 2 minutes
`N= n xx 2 xx 60`
`=2xx10^(20) xx 120`
`=2.4 xx10^(22)`
Promotional Banner

Similar Questions

Explore conceptually related problems

A 100 W point source emits monochromatic light of wavelength 6000 A Calculate the total number of photons emitted by the source per second.

A 100 W bulb is emitting light of wavelength 300 nm .Calculate the number of photon emitted by the bulb in 1 min?

Calculate the number of photons emitted in 10 h by a 60 W sodium lamp (lamda=5893A) .

A 100 watt bulb emits monochromatic light of wavelength 400 nm. Calculate the number of photons emitted per second by the bulb.

A 100 watt bulb emits monochromatic light of wavelength 400 nm. Calculate the number of photons emitted per second by the bulb.

A 100 watt bult emits monochromatic light of wavelength 400 nm. Calcualte the number of photons emitted per second by the bulb.

Photons of wavelength 660 nm are emitted from a 60 watt lamp. What is the number of photons emitted per second ?

A monochromatic source of light emits light of wavelength 198 nm. Calculate : (i) energy of each photon, (ii) Momentum of the photon.

A 200 W bulb emits monochromatic light of wavelenght 1400 A and only 10% of the energy is emitted as light. The number of photons emitted by the bulb per second will be

A bulb of 40 W is producing a light of wavelength 620 nm with 80% of efficiency , then the number of photons emitted by the bulb in 20 seconds are : ( 1eV = 1.6 xx 10^(-19) J , hc = 12400 eV )