Polarization of light confirms that light is MCQ with Answer and Explanation

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Polarization of light confirms that light is

A. Both

B. Transverse

C. Neither

D. Longitudinal

Answer: Option B

Solution (By JKExamLibrary)

Only transverse waves can be polarized.

This question belongs to: Science Physics

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Question #1 Report Error

Assertion (A): Gamma rays are fundamentally un-deflected by electric and magnetic fields. Reason (R): Gamma rays carry no electrical charge.

A. Both A and R are true but R is NOT the correct explanation of A.

B. A is false but R is true.

C. Both A and R are true and R is the correct explanation of A.

D. A is true but R is false.

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Correct Answer: Option C

Explanation:
Electric fields deflect charged particles via Coulomb forces (F=qE), and magnetic fields deflect moving charged particles via Lorentz forces (F=qvB). Gamma rays are purely high-energy electromagnetic photons. Because they lack any electrical charge (q=0), both electric and magnetic forces on them are exactly zero. Therefore, they pass through fields completely un-deflected. R explains A perfectly.

This question belongs to: Science Physics

Question #2 Report Error

Which of the following is an example of a non-contact force?

A. Gravitational force

B. Tension in string

C. Muscular force

D. Frictional force

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Correct Answer: Option A

Explanation:
Gravity, electrostatic, magnetic forces act without direct contact. Friction, tension, normal require contact. Field forces are non-contact.

This question belongs to: Science Physics