Light emitted by Krypton 86 is 6057.8021 Å. Calculate number of wavelengths of Krypton 86 in one metre. What is the order of magnitude ?

Express 1 light year in terms of metre. What is its order of magnitude?

Calculate the number of light minutes in one metre?

How many wavelength of Kr^(86) are there is one metre

The number of wavelengths of orange-red radia¬ tion of Kr-86 contained in one metre are_____.

Calculate the number of photon of light with a wavelength of 6000 Å that provide I joule of energy.

Photo electrons are liberated by ultraviolet light of wavelength 3000 Å from a metalic surface for which the photoelectric threshold wavelength is 4000 Å . Calculate the de Broglie wavelength of electrons emitted with maximum kinetic energy.

Photo electrons are liberated by ultraviolet light of wavelength 3000 Å from a metalic surface for which the photoelectric threshold wavelength is 4000 Å . Calculate the de Broglie wavelength of electrons emitted with maximum kinetic energy.

A sheet of silver is illuminated by monochromatic ultraviolet light of wavelength = 1810 Å . What is the maximum energy of the emitted electron ? Threshold wavelength of silver is 2640 Å .