The wavelength of light in the visible region is about 390 nm for violet colour, about 550 nm (average wavelength) for yellowgreen colour and about 760 nm for red colour. What are the energies of photons in (eV) at the violet.

Light of wavelength 500 nm falls on a metal whose work function is 1.9 eV. find the energy of the Photon in eV

The wavelength of light the spectral emission line of sodium is 589 nm. Find the kinetic energy at which (a) an electron and (b) a neutron,would have the same de Broglie wavelength.

An electron and a photon each have a wavelength of 1.00 nm. Find the energy of the photon?

The wavelength of light from the spectral emission line of sodium is 589 nm. Find the kinetic energy at which a neutron, would have the same de-Broglie wavelength.

Wavelength for high energy EMR transition in H-atom is 91 nm. What energy is needed for this transition?

An electron and a photon each have a wavelength of 1.00 nm. Find the kinetic energy of electron.

Is the speed of light in glass independent of the colour of light? If not, which of the two colours red and violet travels slower in a glass prism?

There are two sources of light, each emitting with a power of 100 W. One emits X-rays of wavelength 1nm and the other visible light of 500 nm. Find the ratio of number of photons of X-rays to the photons of visible light of the given wavelength?

Monochromatic light of wavelength 589 nm is incident from air on a water surface. What are the wavelength, frequency and speed of reflected?