A. diverging (or concave) lens
B. converging (or convex) lens
C. plano concave lens
D. plano convex lens
A lens which converges a beam of parallel rays to a point is called Read More »
A. Simple vibratory motion
B. Standing wave motion
C. Vibratory motion like up and down
D. S.H.M likes the sound
Electron moves in the orbit as Read More »
A. Photon theory of light
B. Dual nature of light
C. Wave nature of light
D. Uncertain nature of light
Compton effect proves the Read More »
A. Karl-Weins law
B. Rayleigh-Jeans law
C. Stephens law
D. Plancks
A. 107m/sec
B. Should be greater than the speed of light.
C. Be zero
D. Not be wave-like
For confinement of electron in a box of radius 10-14m the electron, speed should be Read More »
A. Property of matter and radiation
B. Two-dimensional motion
C. Emission of the certain wavelength
D. Very high velocity
The uncertainty in momentum & position is due to its Read More »
A. Electron microscope
B. Scanning electron microscope
C. Magnetic imaging
D. None of the above
A three-dimensional image is obtained by Read More »
A. Electromagnetic gun
B. Source of electromagnetic waves
C. Deflecting charged particle
D. Converging source of electrons
In the electron microscope, electric & magnetic fields are used as Read More »
A. Penetrating power is high
B. Kinetic energy is large
C. Wavelength is very short
D. All the above reasons
In an electron microscope, we use energetic particles because of Read More »
A. Wave property
B. Particle property
C. Energy particle
D. Electromagnetic wave property
If a diffraction grating is placed in the path of a light beam it reveals Read More »
