As the temperature of black body is raised the wavelength corresponding to maximum intensity________________?

A. Shifts towards longer wavelength
B. Shifts towards shorter wavelength
C. Remain the same
D. Shifts towards longer as well as shorter wavelengths

The name of the photon for quantum of light was proposed by________________?

A. Ampere
B. Plank
C. Thomson
D. Einstein

In Compton scattering, the change in wavelength is maxed if_______________?

A. The angle of scattering is 90°
B. The angle of scattering is 60°
C. The angle of scattering is 180°
D. The angle of scattering is 0

Davison Germer experiment indicates__________________?

A. Interference
B. Polarization
C. Electron diffraction
D. Refraction

A photon is________________?

A. A unit of energy
B. A positively charged particle
C. A quantum of electromagnetic radiation
D. A unit of wavelength

Which one of the following has the largest energy content ?

A. 103 photons of wavelength 2 pm (γ-rays)
B. 102 photons of wavelength 1nm (x-rays)
C. 106 photons of wavelength 50?m (infrared)
D. 106 photons of wavelength 200nm (uv)

A transmitting station emits radio waves of wavelength λ at power P. If h is Planck’s constant & c the speed of light what is the rate of emission of photons ?

A. Λ
B. Speed of sound
C. Speed of lightb.
D. H

After traveling through a vacuum a photon of light entering into some transparent denser medium. Thus the energy of light______________?

A. Increases because wavelength decreases
B. Decreases because speed decreases
C. Remains same
D. Increases then decrease

In a photoelectric effect monochromatic light is incident on a metal surface. If the incident light of twice the intensity but of same wavelength the kinetic energy of the emitted electron_______________?

A. Becomes double
B. Remains same
C. Becomes half
D. First increases then decrease because of the curvilinear graph

If the wavelength of incident radiation is increased in photoemission then_________________?

A. The maximum kinetic energy of the photoelectrons increases
B. The minimum kinetic energy of the photoelectrons decreases
C. The minimum kinetic energy of the photoelectrons increases
D. The average kinetic energy of the photoelectrons decreases