Question 52: Dual Nature of Matter and Radiation

Question

Some laws/processes are given in Column I. Match these with the physical phenomena given in Column II and indicate your answer by darkening appropriate bubbles in the 4 $$	imes$$ 4 matrix given in the ORS.

Column I

Column II

(A)
Transition between two atomic energy levels
(P)
Characteristic X-rays

(B)
Electron emission from a material
(Q)
Photoelectric effect

(C)
Mosley's law
(R)
Hydrogen spectrum

(D)
Change of photon energy into kinetic energy of electrons
(S)
$$\beta$$-decay

Accepted Answer

Reason : Characteristics x-ray are produced due to transition of electron from one energy level to another. Similarly, the line in the hydrogen spectrum is obtained due to transition of electron from one energy level to another.
A $$	o$$ P, R
Reason : In photoelectric effect electron from the metal surface are emitted upon the incidence of light of appropriate freaquency.
Note : In $$\beta$$-decay, electrons are emitted from the nucleus of atom.
B $$	o$$ Q, S
Moseley gave a law which related frequency of emitted X-ray with the atomic number of the target material.
$$\sqrt v=a(z-b)$$
C $$	o$$ P
In photo electric effect, energy of photons of incident ray gets converted into K.E of emitted electron.
D $$	o$$ Q

Answer

A $$	o$$ (P); B $$	o$$ (Q); C $$	o$$ (P); D $$	o$$ (Q)

Answer

A $$	o$$ (R); B $$	o$$ (Q, S); C $$	o$$ (P); D $$	o$$ (Q, P)

Answer

A $$	o$$ (P, R); B $$	o$$ (Q, S); C $$	o$$ (P); D $$	o$$ (Q)

Answer

A $$	o$$ (P, R); B $$	o$$ (Q, S); C $$	o$$ (Q); D $$	o$$ (P)

Dual Nature of Matter and Radiation

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