A lens (focal length $50 c m$ ) forms the image of a distant object which subtends an angle of $1$ milliradian at the lens. What is the size of the image?

5 m m

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1 m m

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0.5 m m

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0.1 m m

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Solution

The correct option is D $0.5 m m$
Size of image $= f θ = 0.5 \times (1 \times 10^{- 3}) = 0.5 m m$

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A lens (focal length 50 cm) forms the image of a distant object which subtends an angle of 1 milliradian at the lens. What is the size of the image?

The correct option is D 0.5 mmSize of image =fθ=0.5×(1×10−3)=0.5 mm

A lens (focal length $50 c m$ ) forms the image of a distant object which subtends an angle of $1$ milliradian at the lens. What is the size of the image?

The correct option is D $0.5 m m$
Size of image $= f θ = 0.5 \times (1 \times 10^{- 3}) = 0.5 m m$