Numbers of waves of orange light emitted by krypton in 1m is _______________.

At one time, the metre was defined as 1650763.73 wavelengths of the orange light emitted by a light source containing Kr^(86) atoms. What is the corresponding photon energy of this radiation?

The light emitting diode (LED),

A rocket is going away from the earth at a speed of 10^(6) m/s . If the wavelength of the light wave emitted by a light source on it is 5400 Å , what will be its Doppler Shift ?

The number of electrons in the penultimate orbit of krypton atom are

A photosensitive surface ejects electrons when green light is incident on it. It does not emit any photoelectrons when exposed to orange light. Will there be any photoelectrons emission if blue light is incident on it ?

The wavelength of light having wave number 4000 cm is

Wavelength of orange light is greater than that of blue light.