## The uncertainty in momentum & position is due to…

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# Modern Physics

## A three-dimensional image is obtained by________________?

A three-dimensional image is obtained by________________? A. Electron microscopeB. Scanning electron microscope C. Magnetic imaging D. None of the above

## In the electron microscope, electric & magnetic fields are used as_______________?

In the electron microscope, electric & magnetic fields are used as_______________? A. Electromagnetic gun B. Source of electromagnetic waves C. Deflecting charged particleD. Converging source of electrons…

## In an electron microscope, we use energetic particles because of______________?

In an electron microscope, we use energetic particles because of______________? A. Penetrating power is high B. Kinetic energy is largeC. Wavelength is very short D. All the above reasons

## If a diffraction grating is placed in the path of a light beam it reveals______________?

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______________?

In Davisson-Germer experiment the diffracted proton from crystal shows______________? A. Particle propertyB. Wave property C. Light property D. Quantum property

## The velocity of a particle of mass m of de-Broglie wavelength λ is______________?

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-1D. v = 2 ×× 106 ms-1

## A photon of wavelength 900nm behaves like a particle of mass______________?

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…

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…

If a photon is reflected from the mirror then the change in momentum of each photon is_______________? A. ZeroB. Double C. Half D. 1

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

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…