Cathode rays have velocity

Important Questions on Modern Physics

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IMPORTANT

Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Physics>Chapter 14 - Modern Physics>Practice Exercise>Q 7

Positive rays were discovered by

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IMPORTANT

Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Physics>Chapter 14 - Modern Physics>Practice Exercise>Q 8

The phenomenon of photoelectric effect was explained by

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IMPORTANT

Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Physics>Chapter 14 - Modern Physics>Practice Exercise>Q 9

Photoelectrons are emitted when

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IMPORTANT

Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Physics>Chapter 14 - Modern Physics>Practice Exercise>Q 10

The work function for photoelectric effect

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IMPORTANT

Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Physics>Chapter 14 - Modern Physics>Practice Exercise>Q 11

Einstein was awarded nobel prize for his

EASY

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IMPORTANT

Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Physics>Chapter 14 - Modern Physics>Practice Exercise>Q 12

The photoelectric effect is based on the law of conservation of

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IMPORTANT

Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Physics>Chapter 14 - Modern Physics>Practice Exercise>Q 13

The momentum of a photon of wavelength $\lambda$ is given by (Here $h$ is Planck's constant)

EASY

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IMPORTANT

Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Physics>Chapter 14 - Modern Physics>Practice Exercise>Q 14

The rest mass of a photon of wavelength $\lambda$ is (Here $h$ is Planck's constant)