[" If mean wavelength of light radiated by "100W],[" lamp per second are "5000A" ,then number of "],[" photons radiated per second are "]

If mean wavelength of light radiated by 100 W lamp is 5000 Å , then number of photons radiated per second are

An AIR station is broadcasting the waves of wavelength 300 metres . If the radiating power of the transmitter is 10 kW , then the number of photons radiated per second is

An AIR station is broadcasting the waves of wavelength 300 metres . If the radiating power of the transmitter is 10 kW , then the number of photons radiated per second is

Infrared lamps are used in restaurants to keep the food warm. The infrared radiation is strongly absorbed by water, raising is temperature and that of the food. If the wavelength of infrared radiation is assumed to be 1500nm , then the number of photons per second of infrared radiation produced by an infrared lamp that consumes energy at the rate of 100W and is 12% efficient only is y xx 10^(19) . Find the value of y .

A 100 watt bulb radiates 15% of energy given in the form of visible light . If wavelength of the visible photons are nearly 5,000Å , then calculate the number of visible light photons emitted per second.

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

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

A ultra violet light bulb, emitting 400 nm and infrared bulb emitting 700 nm wavelength radiation each are rated at 130 W. Then the ratio of the number of photons emitted per second by the UV & IR sources :-

A monochromatic radiation of wavelength lamda and intensity I is incident on a plate of area A. Find the number of photons striking the plate per second.