Optics

Light, reflection, refraction, lenses, and optical instruments.

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QUESTION NO 01

Speed of light in vacuum is approximately?

Answer: 3 × 10⁸ m/s

c ≈ 3.00 × 10⁸ m/s in vacuum.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 02

Critical angle for glass–air is typically around?

Answer: 42°

For n ≈ 1.5 glass to air, c ≈ arcsin(1/1.5) ≈ 42°.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 03

Hypermetropia is corrected by?

Answer: Convex lens

Farsightedness is corrected with converging (convex) lenses.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 04

Diffraction is more noticeable when obstacle size is?

Answer: Comparable to wavelength

Wave effects like diffraction are significant when sizes ~ λ.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 05

A convex lens is also called?

Answer: Converging lens

A convex (converging) lens focuses parallel rays to a focal point.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 06

Power of a lens (in dioptres) is?

Answer: 1/f with f in metres

P(D) = 1/f(m).

Shahzad Mahota @shahzad-mahota

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QUESTION NO 07

Critical angle for glass–air is typically around?

Answer: 42°

For n ≈ 1.5 glass to air, c ≈ arcsin(1/1.5) ≈ 42°.

Shahzad Mahota @shahzad-mahota

302 Quizzes

2930 Questions

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QUESTION NO 08

Diffraction is more noticeable when obstacle size is?

Answer: Comparable to wavelength

Wave effects like diffraction are significant when sizes ~ λ.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 09

Young's double-slit fringe width is?

Answer: λD/d

β = λD/d for YDSE.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 10

A convex lens is also called?

Answer: Converging lens

A convex (converging) lens focuses parallel rays to a focal point.

Shahzad Mahota @shahzad-mahota

302 Quizzes

2930 Questions

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Optics

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Electricity & Magnetism

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Speed of light in vacuum is approximately?

Critical angle for glass–air is typically around?

Hypermetropia is corrected by?

Diffraction is more noticeable when obstacle size is?

A convex lens is also called?

Power of a lens (in dioptres) is?

Critical angle for glass–air is typically around?

Diffraction is more noticeable when obstacle size is?

Young's double-slit fringe width is?

A convex lens is also called?

Optics

More topics in Physics

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Electricity & Magnetism

Mechanics

Modern Physics

Optics

Thermodynamics

Waves & Sound

Explore

Speed of light in vacuum is approximately?

Explanation

Critical angle for glass–air is typically around?

Explanation

Hypermetropia is corrected by?

Explanation

Diffraction is more noticeable when obstacle size is?

Explanation

A convex lens is also called?

Explanation

Power of a lens (in dioptres) is?

Explanation

Critical angle for glass–air is typically around?

Explanation

Diffraction is more noticeable when obstacle size is?

Explanation

Young's double-slit fringe width is?

Explanation

A convex lens is also called?

Explanation