Home
Class 12
PHYSICS
Calculate the number of photons emitted ...

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

Text Solution

Verified by Experts

The energy of the photon `=(hc)/(lamda)`
`((6.63xx10^(-34))(3xx10^(8)))/(5893xx10^(-10))=3.374xx10^(-19)`J
Therefore, the number of photons emitted by sodium lamp in 10h
`(60xx10xx3600)/(3.374xx10^(19))=6.40xx10^(24)`
Promotional Banner

Topper's Solved these Questions

  • PHOTOELECTRIC EFFECT

    CENGAGE PHYSICS|Exercise Examples|8 Videos

  • PHOTOELECTRIC EFFECT

    CENGAGE PHYSICS|Exercise Exercise 3.1|15 Videos

  • NUCLEI

    CENGAGE PHYSICS|Exercise QUESTION BANK|59 Videos

  • RAY OPTICS

    CENGAGE PHYSICS|Exercise DPP 1.6|12 Videos

Similar Questions

Explore conceptually related problems

Calculate the number of photon emitted in 10 hours by a 60 W sodium lamp ( lambda of photon = 5893 Å)

Cacluate the number of photons emitted in 10 hours by a 60 W(J//s^(-1)) sodium lamp ( lambda of photon =5893Å)

The number of photons emitted in 10 hours by a 60 W sodium lamp (lambda of photon = 6000 Å)

Calculate the number of photons emitted per second by a 10 W sodium vapour lamp. Assume that 60% of the consumed energy is converted into light. Wavelengths of sodium light =590nm.

Caculate the number of photons emitted per second by a 10 watt sodium vepour lamp. Assume tha t 90% of the consumed energy is converted into light. Wavelength of sodium light is 590nm. h=6.62xx10^(-34)Js