If the kinetic energy of a free electron doubles, its de Broglie wavelength changes by the factor: 1?
The existence of positron was discovered in: 1928
When the K.E. of photoelectric is zero, the frequency of incident photon is: Equal to
The numerical value of Compton wavelength is equal to: 2.43 x 10-12m
The minimum energy required for occurrence of pair production is: 1.02Me.V
If an object moves with speed of light, its mass will be: infinity
The most refined form of matter is: Light
The value of Stefan is constant is: 5.67 x10-8 wm-2k-4
Wave nature of particle was given by: Louis de Broglie
Max planck received noble prize in: 1918
The value of Wien’s constant: 2.9×10-3mk
The minimum energy required for occurrence of pair production is: 1.02Me.V
Which one of the following paved the way for modern physics: Theory of relativity
Compton shift is maximum for scattering angle of photon: 90o
Platinum wire becomes yellow at a temperature of: 1300<sup>o</sup>C
When a very high energy modeules such as y radiation interact with matter, the phenomenon arising will be: Pair production
The uncertainty principle was given by: Heisenberg
Anti particle of electron is: Positron
Eintein’s Photoelectric equation is Ek= hf -? in this equation E1, refers to: Maximum K.E of emited electrons
De-Broglie waves are associated with: All moving particles
Albert Einstein got noble prize for service in: Photoelectric effect
The photoelectric effect predicts that light is made of: Photons
The unit of work function is: Electron volt
In an nihilation emitted photons moves in opposite directions to conserve: Momentum
Pair production cannto take place in vacuum because: Momentum is not conserved
The converses of annihilation of matter is: Pair production
Wave nature of light appears in: Interference
Pair production occurs only when energy of photon is at least equal in: 1.02 MeV
The Compton effect is associated with: X-rays
Photodiode is used for wave nature of: Light
We can never accurately describes all aspects of sbatomic particles simulatanously. It is correct according to: Uncertainity Priciple
A perfect absorber must also be perfect: Radiator
If the energy of photon is 10 eV and work function is 5 eV, then the a value of stopping potential will be: 5 V
When platinum is heated is become dull red at: 500°C
Albert Einstein got noble prize in: 1921
The minimum frequency needed to emit an electron form metal surface is called: Threshold frequency
Albert Einstein got noble prize for service in: Photoelectric effect
The unit for Plank’s constant is: Js
The concept of direction is purely: Relative
The emission of electrons from metal surface when exposed to light is called: Photoelectric effect
Minimum energy needed to escape an electron ofrm metal surface is called: Work function
Unit of Stephen’s constant is: W m-2 K-4
Wave nature of particle was given by: Louis de Broglie