Dual Nature of Matter and Radiation (JEE (Based on NTA Guidelines-IIT Engg.) Advanced Physics): Questions 1 - 3 of 15

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Question number: 1

» Dual Nature of Matter and Radiation » De-Broglie Relation

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Appeared in Year: 2015

MCQ▾

Question

An electron in an excited state of ion has angular momentum . The de Broglie wavelength of the electron in this state is (where is the Bohr radius). The value of is:

Choices

Choice (4) Response

a.

2

b.

5

c.

7

d.

3

Question number: 2

» Dual Nature of Matter and Radiation » Dual Nature of Radiation

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Appeared in Year: 2016

MCQ▾

Question

A metal is heated in a furnace where a sensor is kept above the metal surface to read the power radiated by the metal. The sensor has a scale that displays , where is a constant. When the metal surface is at a temperature of , the sensor shows a value . Assume that the emissivity of the metallic surface remains constant. What is the value displayed by the sensor when the temperature of the metal surface is raised to ?

Choices

Choice (4) Response

a.

5

b.

9

c.

7

d.

11

Question number: 3

» Dual Nature of Matter and Radiation » Black-Body Radiation

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Appeared in Year: 2014

MCQ▾

Question

Parallel rays of light of intensity are incident on a spherical black body kept in surroundings of temperature . Take Stefan – Boltzmann constant and assume that the energy exchange with the surroundings is only through radiation. The final steady state temperature of the black body is close to:

Choices

Choice (4) Response

a.

b.

c.

d.

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