Dispersion, Rainbows & Eye Defects

Prism dispersion and common vision corrections. Ideal for students preparing board exams and competitive tests.

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QUESTION NO 01

Dispersion by a prism is due to?

Answer: Wavelength-dependent refractive index

n varies with wavelength, so colours separate.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 02

Primary rainbow is caused by?

Answer: Refraction and reflection in raindrops

Rainbows involve refraction, dispersion, and internal reflection in water drops.

Shahzad Mahota @shahzad-mahota

302 Quizzes

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QUESTION NO 03

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 04

Myopia is corrected by?

Answer: Concave lens

Nearsightedness is corrected with diverging (concave) lenses.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 05

Hypermetropia is corrected by?

Answer: Convex lens

Farsightedness is corrected with converging (convex) lenses.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 06

Interference requires?

Answer: Coherent sources

Stable interference patterns need coherent waves.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 07

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 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

Polarization proves light is?

Answer: Transverse wave

Only transverse waves can be polarized as light is.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 10

Optical fibre works mainly on?

Answer: Total internal reflection

Light is guided in fibres by repeated TIR.

Shahzad Mahota @shahzad-mahota

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Shahzad Mahota

@shahzad-mahota

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Dispersion, Rainbows & Eye Defects

Dispersion by a prism is due to?

Primary rainbow is caused by?

Power of a lens (in dioptres) is?

Myopia is corrected by?

Hypermetropia is corrected by?

Interference requires?

Young's double-slit fringe width is?

Diffraction is more noticeable when obstacle size is?

Polarization proves light is?

Optical fibre works mainly on?

Published By

Shahzad Mahota

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00

00

00

00

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Dispersion, Rainbows & Eye Defects

Dispersion by a prism is due to?

Explanation

Primary rainbow is caused by?

Explanation

Power of a lens (in dioptres) is?

Explanation

Myopia is corrected by?

Explanation

Hypermetropia is corrected by?

Explanation

Interference requires?

Explanation

Young's double-slit fringe width is?

Explanation

Diffraction is more noticeable when obstacle size is?

Explanation

Polarization proves light is?

Explanation

Optical fibre works mainly on?

Explanation

Published By

Shahzad Mahota

00

00

00

00

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