A 124 W bulb converts only 15 % of the energy supplied to it into visible light of wavelength 640 nm . How many photons are emitted by the light bulb in one second ?

Only a fraction of the electrical energy supplied to a tungsten light bulb is converted into visible light. If a 100 W light bulb converts 20% of the electrical energy into visible light (lambda=662.6nm) , then the number of photons emitted by the bulb per second 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 100 W bulb is emmiting light of wavelength 300 nm .Calculate the number of photon emitted by the bulb in 1 min?

A bulb emits light of 4500 Å . The bulb is rated as 150 watt and 9 % of the energy is emited as light . How many photons are emitted by the bulb per second ?

A bulb emits light of wavelength 4500Å .The bilb is nrated as 150 and 8% of the energy is emmitted as light .How amny photon are emitted by the bulb per second?

A 200 W bulb emits monochromatic light of wavelenght 1400 A and only 10% of the energy is emitted as light. The number of photons emitted by the bulb per second will be