A lens has focal length of 50 cm. What i...

A lens has focal length of 50 cm. What is its power ?

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A convex lens has a focal length of 25 cm. Calculate the distance of the object from the lens if the image is to be formed on the opposite side of the lens at a distance of 75 cm from the lens. What will be nature of image ?

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What is units of power of lens ?
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A lens has focal length of 50 cm. What is its power ?
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Write the formula for the refractive index of the prism.
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Write the formula for the refractive index of the prism.
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A prism with an angle A = 60^(@) produces an angle of minimum deviatio...
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Expand VIBGYOR.
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Which colour of light can split into VIBGYOR?
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