In Davisson-Germer experiment the diffracted proton from crystal shows
A. Particle property
B. Wave property
C. Light property
D. Quantum property
In Davisson-Germer experiment the diffracted proton from crystal shows Read More »
Physics
The velocity of a particle of mass m of de-Broglie wavelength λ is
A. v = 3 ×× 106 ms-1
B. v = 2 ×× 10 ms-1
C. v = 2 ×× 6 ms-1
D. v = 2 ×× 106 ms-1
The velocity of a particle of mass m of de-Broglie wavelength λ is Read More »
A photon of wavelength 900nm behaves like a particle of mass
A. 5.53 x 10-36kg
B. 0 kg.
C. 2.46 x 10-36kg
D. 1.84 x 10-44kg
A photon of wavelength 900nm behaves like a particle of mass Read More »
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
If the wavelength of incident radiation is increased in photoemission then Read More »
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
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 light
D. h
Which 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)
Which of the following has the largest energy content? Read More »
A photon is
A. A unit of energy
B. A positively charged particle
C. A quantum of electromagnetic radiation
D. A unit of wavelength