`10^(20)` photons of wavelength 660 nm are emitted per second from a lamp . What is the wattage of the lamp ?

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 ?

Photons of wavelength 600 nm are emitted from a 60 watt lamp. What is the number of photons emitted per second ? Take h = 6.6 xx 10^-34 Js

The number of Photons of wavelength 660 nm emitted per second by an electric bulb of 60 W is ..... (Take h= 6.6 xx 10^(-34) Js )

A bulb emits 2 xx 10^20 photons of wave length 400 nm in one second. Calculate the rate of emission of photons per second.

A 100 W sodium lamp is radiating light of wavelength 5890A , uniformly in all directions, a. At what rate, photons are emitted from the lamp? b. At what distance from the lamp, the average flux is 1 photon( cm^2-s)^-1? c. What are the photon flux and photon density at 2m from the lamp?

A 100 W sodium lamp is radiating light of wavelength 5890A , uniformly in all directions, a. At what rate, photons are emitted from the lamp? b. At what distance from the lamp, the average flux is 1 photon( cm^2-s)^-1? c. What are the photon flux and photon density at 2m from the lamp?

5% of the energy supplied to a lamp is radiated as a visible light. How many quanta of light are emitted per second by 100 watt lamp ? Assume the average wavelength of visible light at 555 nm

A lamp mainly emits light of wavelength lambda . The lamp is rated at P watt and 8% of the energy is emitted as visible light. (i) How many photons of light are emitted by the lamp per second? (ii) How many photons are falling per second on a square whose length of each side is a, held perpendicular to the incident photons at a distance r from the lamp.