For which wavelength of light, our eye is most sensitive?

For which frequency of light, the eye is most sensitive?

Which part of humnan eye is most sensitive to bright light?

State the factors, which controls wavelength of light, emitted by a LED.

What happens to the wavelength of light when it goes from rarer to denser medium?

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.

What is the advantage in choosing the wavelength of light radiation as a standard of length?