> Q. A spherical mirror forms an erect image of size $ frac{text{1}}{text{3}}text{rd} $ of the object size. If the distance between the object and the image is 30 cm, the focal length of the mirror is : – LIVE ANSWER TODAY

Q. A spherical mirror forms an erect image of size $ frac{text{1}}{text{3}}text{rd} $ of the object size. If the distance between the object and the image is 30 cm, the focal length of the mirror is :

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A spherical mirror forms an erect image of size $ frac{text{1}}{text{3}}text{rd} $ of the object size. If the distance between the object and the image is 30 cm, the focal length of the mirror is :

Solution:

Answer (b) -30cm

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