Assuming , for simplicity , that the average wavelength for each photon is 694 nm , then the number of photons emiited in 1s by a 100 W red light source is

If the wavelength of light emitted by a sodium vapour lamp is 5893 A then the numebr of photons emitted in 5 hour by a 50 W lamp will be

The number of photons of light having wave number 'x' in 10 J of energy source is :

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

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.

A 100 watt bult emits monochromatic light of wavelength 400 nm. Calcualte 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 bulb emits monochromatic light of wavelength 400 nm. Calculate 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 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 )

Nitrogen laser produces a radiation at a wavelength of 337.1 nm. If the number of photons emitted is 5.6 xx 10^(24). Calculate the power of this laser.