A 50 watt bulb emits monochromatic red light of wavelength of 795 nm. The number of photons emitted per second by the bulb is `x xx 10^20`. The value of x is _______.
(Nearest integer)
[Given : `h = 6.63 xx 10^(-34) Js and c = 3.0 xx 10^8 ms^(-1)`]

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.

A bulb of 120watts emits of light of wave length 920nm, then number of photon enitted by bulb per second are [X]xx10^20 then value of X is

The number of photons emitted by a monochromatic (single frequency) infrared range finder of power 1 mW and wavelength of 1000 nm, in 0.1 second is "x" xx 10^(13) . The value of r is . (Nearest integer) (h=6.63 xx10^(-34) Js, c= 3.00 xx 10^(8) ms^(-1))

A 2 mW laser operates at a wavelength of 500 nm. The number of photons that will be emitted per second is: [Given Planck’s constant h = 6.6 xx 10^(-34)Js , speed of light c = 3.0 xx 10^(8) m//s ]

A monochromatic source of light emits photons of frequency 6 xx 10^(14 )Hz . The power emitted by the source is 8 x 10^(-3)W. Calculate the number of photons emitted per second. (Take h = 6.63 xx 10^(-34) Js )