Wavelength of rediowaves is 124 nm. Total number of photons per second produced by a source that consumes energy at the rate of `16"W is x" xx 10^(19).` the value of x 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 .

Infrared lamps are used in restaurants to keep the food warm. The infrared radiation is strongly absorbed by water, raising its temperature and that of the food. If the wavelength of infrared radiationis assumed to be 1500 nm, and the number of quanta of infrared radiation produced per second by an infrared lamp (that consumes enregy at the rate of 100 W and is 12% effcient only) is (xx10^(19) , then the value of x is : (Given: h= 6.665xx10^(-34)J-s)

Infrared lamps are used in restaurants to keep the food warm. The infrared radiation is strongly absorbed by water, raising its temperature and that of the food. If the wavelength of infrared radiationis assumed to be 1500 nm, and the number of quanta of infrared radiation produced per second by an infrared lamp (that consumes enregy at the rate of 100 W and is 12% effcient only) is (xx10^(19) , then the value of x is : (Given: h= 6.665xx10^(-34)J-s)

Infrared lamps are used in restaurants to keep the food warm. The infrared radiation is strongly absorbed by water, raising its temperature and that of the food. If the wavelength of infrared radiationis assumed to be 1500 nm, and the number of quanta of infrared radiation produced per second by an infrared lamp (that consumes enregy at the rate of 100 W and is 12% effcient only) is (x xx10^(19) , then the value of x is : (Given: h= 6.665xx10^(-34)J-s)

The number of photons emitted per second by a 60W source of monochromatic light of wavelength 663nm is

The number of photons emitted per second by a 60 W source of monochromatic light of wavelength 663 nm is (h= 6.63xx10^(-34) Js)

The number of photons emitted per second by a 62W source of monochromatic light of wavelength 4800 A^(@) is

Find the number of photons emitted per second by a source of power 25W. Assume, wavelength of emitted light = 6000Å. h = 6.62 xx 10^(-34)J.s

The number of photons emitted per second by a 60 W source of monochromatic light of wavelength 663 nm is: (h=6.63xx10^(-34)Js )

The number of photons emitted per second by a 60 W source of monochromatic light of wavelength 663 nm is: (h=6.63xx10^(-34)Js )