Home
Class 12
CHEMISTRY
What is power (in watt) of a light sourc...

What is power (in watt) of a light source emitting `3.125 xx 10^(18)` photons per second, while the wavelength of light is `620 nm` ? (use `hc = 12400 eVÅ`)

Text Solution

Verified by Experts

The correct Answer is:
`1`

Let the power be `x` wants.
No. of photons emitted per second `xx` Energy of `1` photon `=` Total energy
`:. 3.125 xx 10^(18) xx (12400)/(6200) = (x)/(1.6 xx 10^(-19)`
`:. x = 1`
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • TEST PAPERS

    RESONANCE ENGLISH|Exercise PART - III CHEMISTRY|46 Videos
  • TEST PAPERS

    RESONANCE ENGLISH|Exercise PART - III CHEMISTRY|20 Videos
  • TEST PAPERS

    RESONANCE ENGLISH|Exercise FST-3|30 Videos
  • SURFACE CHEMISTRY

    RESONANCE ENGLISH|Exercise Section - 5|1 Videos
  • TEST SERIES

    RESONANCE ENGLISH|Exercise CHEMISTRY|50 Videos

Similar Questions

Explore conceptually related problems

What is power (in watt) of a light source emitting 7.25 xx 10^(18) photons per second, while the wavelength of light is 620 nm ? (use hc = 12400 eVÅ )

What is power (in watt) of a light source emitting 4.25 xx 10^(18) photons per second, while the wavelength of light is 620 nm ? (use hc = 12400 eVÅ )

What is power (in watt) of a light source emitting 5.25 xx 10^(18) photons per second, while the wavelength of light is 620 nm ? (use hc = 12400 eVÅ )

A monochromatic source of light operating at 200W emits 4 xx 10^20 photons per second. Find the wavelength of the light.

A hot metal emits photons of light with energy 3.0 xx 10^(-19) J . Calculate the frequency and wavelength of the photon?

A hot metal emits photons of light with energy 3.0 xx 10^(-19) J . Calculate the frequency and wavelength of the photon?

What is the energy in joule of photon of light whose wave length is 3.0 x 10^3 nm

What is the energy in joule of photon of light whose wave length is 15 x 10^3 nm

What is the energy in joule of photon of light whose wave length is 12 x 10^3 nm

How many photons per second does a one watt bulb emit if its efficiency is 10% and the wavelength of light emitted is 500 nm