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Standard XII

Physics

f-R Relationship

A convex lens...

Question

A convex lens forms a real image of an object for its two different positions on a screen. If height of the image in both the cases be 8 cm and 2 cm, then height of the object is

16 cm

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8 cm

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4 cm

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2 cm

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Solution

The correct option is C 4 cm
By using $O = \sqrt{I_{1} I_{2}} \Rightarrow O = \sqrt{8 \times 2} = 4 c m .$

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A convex lens forms a real image of an object for its two different positions on a screen. If height of the image in both the cases be 8 cm and 2 cm, then height of the object is

The correct option is C 4 cmBy using O=√I1I2⇒O=√8×2=4cm.

The correct option is C 4 cm
By using $O = \sqrt{I_{1} I_{2}} \Rightarrow O = \sqrt{8 \times 2} = 4 c m .$