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Physics - Wave Optics Question with Solution | TestHub

PhysicsWave OpticsDiffractionMedium2 minQB

PhysicsMediumsingle choice

You are in an airplane at an altitude of $10, 000 m$ . The pupil of your eye is about 3.0 mm in diameter and the wavelength of light $λ = 550 nm$ . If you look down at the ground, the minimum separation s between objects that you could distinguish is :

Options:

Answer:

Solution:

Rayleigh criterion: $θ = 1.22 \frac{λ}{D}$

$= 1.22 \times \frac{550 \times 1 0 ^{- 9}}{3.0 \times 1 0 ^{- 3}}$

$= 2.237 \times 1 0^{- 4}$ rad.

Minimum separable distance from altitude h = 10,000 m: $s = θ h = 2.237 \times 1 0^{- 4} \times 1 0^{4}$

$= 2.24$ m.

Correct option: (B)

Subject:PhysicsTopic:Wave OpticsSubtopic:Diffraction

⏱ 2mℹ️ Source: QB

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