A particle at rest explodes into two parts having their masses in the ratio 1 : 4. The ratio of their respective de-Broglie wavelength is

Light of frequency 1.9 times the threshold frequency is incident on photo-sensitive material. If the freuquency is halved and intensity is doubled, the photo-current becomes

To produce hard X-rays in coolidge tube we should increase :

Given that h is Planck’s constant, c is speed of light and e is the charge on the electrons.In X-ray tube, the electrons are accelerated through a potential V, before strking the target.The emitted X-rays photons will have wavelengths

The shortest wavelength of X-rays emitted from an X-ray tube depends upon

X-rays region lies between

When high speed electrons hit a target of high atomic number

In producing X-rays a beam of electrons accelerated by a potential difference V is made to strike a metal target. For what value of V of the following X-rays have the largest wavelength

Radiations of frequency v are incident on a photo sensitive metal. The maximum kinetic energy of the photo electrons is E. When the frequency of the incident radiations is doubled, what is the maximum kinetic energy of the photoelectrons?

For the structural analysis of crystals, X-rays are used because

What determines the hardness of the X-rays obtained from the Coolidge tube?

Threshold wavelength of a metal is 4000 Å. If light of wavelength 3000 Å irradiates the surface, the maximum kinetic energy of photo electron is :

Light of wavelength 4000 Å is incident on a metal plate whose work function is 2 eV. The maximum kinetic energy of the emitted photoelectron will be :

We wish to see inside an atom. Assuming the

atom to have a diameter of 100 pm, this means

that one must be able to resolve a width of

say 10 pm. If an electron microscope is used,

the minimum electron energy required is about

The slope of the stopping potential versus

frequency graph for photoelectric effect is

equal to :

When a point source of monochromatic light is at a distance of 0.2m from a photoelectric cell, the cut off voltage and the saturation current are 0.6 volt and 18 mA respectively. If the same source is placed 0.6 m away from the photoelectric cell then

What is the de Broglie wavelength of an electron possessing 100 eV kinetic energy?

The de Broglie wavelength of an electron is

same as that of a photon. If the velocity of

electron is 50% the speed of light, then kinetic

energy of photon/kinetic energy of electron =