An object of length 4 cm is placed in front of a concave mirror at a distance 30 cm. The focal length of mirror is 15 cm. (a) Where will the image form? (b) What will be the length of image?
Reflection of Light
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Question

An object of length 4 cm is placed in front of a concave mirror at a distance 30 cm. The focal length of mirror is 15 cm. (a) Where will the image form? (b) What will be the length of image?

KnowledgeBoat · Accepted Answer

(a) Given, u = 30 cm (negative) f = 15 cm (negative) Mirror formula: Substituting the values in the formula above, we get, Hence, the image is formed at 30 cm in front of the mirror (b) Magnification Hence, length of image = 4 cm Negative sign represents that the image is inverted.

Computer Applications

An object of length 4 cm is placed in front of a concave mirror at a distance 30 cm. The focal length of mirror is 15 cm. (a) Where will the image form? (b) What will be the length of image?

Reflection of Light

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