In an electron microscope, we use energetic particles because of:
A. Penetrating power is high
B. Kinetic energy is large
C. Wavelength is very short
D. All the above reasons
If a diffraction grating is placed in the path of a light beam it reveals:
A. Wave property
B. Particle property
C. Energy particle
D. Electromagnetic wave property
In Davisson-Germer experiment the diffracted proton from crystal shows:
A. Particle property
B. Wave property
C. Light property
D. Quantum property
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
If n number of the photon is striking on a metal surface then total momentum exerted is:
A. p
B. n
C. 0
D. None
If a photon is reflected from the mirror then the change in momentum of each photon is:
A. Zero
B. Double
C. Half
D. 1
A photon is:
A. A unit of energy
B. A positively charged particle
C. A quantum of electromagnetic radiation
D. A unit of wavelength
Davison Germer experiment indicates:
A. Interference
B. Polarization
C. Electron diffraction
D. Refraction
The name of the photon for quantum of light was proposed by:
A. Ampere
B. Plank
C. Thomson
D. Einstein
Einstein’s photoelectric equation is given by:
A. 1/2 mvmax2=hf+Φ
B. 1/2 mvmax2-hf = Φ
C. 1/2 mvmax2=hf-Φ
D. All of above are correct
