Monochromatic light of frequency is produced by a laser. The power emitted is (a) What is the energy of a photon in the light beam? (b) How many photons per second, on an average, are emitted by the source?
The wavelength of light in the visible region is about for violet colour, about average wavelength for yellow-green color and about for red colour. What are the energies of photons in at the violet end, average wave length, yellow-green colour, and red end of the visible spectrum?
The wavelength of light in the visible region is about for violet colour, about average wavelength for yellow-green colour and about for red colour. From which of the photosensitive materials with work functions listed in table and can you build a photoelectric device that operates with visible light?
A particle is moving three times as fast as an electron.The ratio of the de Broglie wavelength of the particle to that of theelectron is . Calculate the particle’s mass and identify the particle.