+91-8076753736[email protected]
logo
logo
-->

Dual Nature Of Radiation And Matter

Question
CBSEENPH12047785
Wired Faculty App

If alpha, beta and gamma rays carry same momentum, which has the longest wavelength?

  • Alpha rays

  • Beta rays

  • Gamma rays

  • None all have same wavelength

Solution

D.

None all have same wavelength

On the basis of dual nature of light, Lious de-Broglie suggested that the dual nature is not only of light, but each moving material particle has the dual nature.

He assumed a wave to be associated with each moving material particle which is called the matter wave. The wavelength of this wave is determined by the momentum of the particle. If p is the momentum of the particle, the wavelength of the wave associated with it is

                                     λ = hp 

Where h is Planck's constant.

Since it is given that alpha, beta and gamma rays carry same momentum, so they will have same wavelength.

Some More Questions From Dual Nature of Radiation and Matter Chapter

Wave property of electrons implies that they will show diffraction effects. Davisson and Germer demonstrated this by diffracting electrons from crystals. The law governing the diffraction from a crystal is obtained by requiring that electron waves reflected from the planes of atoms in a crystal interfere constructively (see in the figure).



In an experiment, electrons are made to pass through a narrow slit of width’ comparable to their de Broglie wavelength. They are detected on a screen at a distance ‘D’ from the slit (see figure). 

Which of the following graph can be expected to represent the number of electrons ‘N’ detected as a function of the detector position ‘y’(y = 0 corresponds to the middle of the slit)? 

The time by a photoelectron to come out after the photon strikes is approximately

An alpha nucleus of energy 1 /2 mv2 bombards a heavy nuclear target of charge Ze. Then the distance of closest approach for the alpha nucleus will be proportional to 

If I0 is the intensity of the principal maximum in the single slit diffraction pattern, then what will be its intensity when the slit width is doubled?

The maximum number of possible interference maxima for slit-separation equal to twice the wavelength in Young’s double-slit experiment is

According to Einstein’s photoelectric equation, the plot of the kinetic energy of the emitted photo electrons from a metal Vs the frequency, of the incident radiation gives straight line whose slope

Mock Test Series

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation