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Spherical Mirror Common Terms & Rays

Match the Fol...

Question

Match the Following:

1. Concave mirror A. Focal length is positive

2. Convex mirror B. Focal length is infinity

3. Plane mirror C. Focal length is negative

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Solution

1. Concave mirror - C. Focal length is negative

2. Convex mirror - A. Focal length is positive

3. Plane mirror - B. Focal length is infinity

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Q. According to New Cartesian Sign Convention:

(a) focal length of concave mirror is positive and that of convex mirror is negative
(b) focal length of both concave and convex mirrors is positive
(c) focal length of both concave and convex mirrors is negative
(d) focal length of concave mirror is negative and that of convex mirror is positive

Q. A concave lens of focal length 20 cm placed in contact with a plane mirror acts as a

Why focal length of convex mirror and convex lens is positive while concave mirror and concave lens negative?

Q. Is the focal length of convex mirror and concave lens infinity

Q. A concave lens of focal length 20 cm placed in contact with a plane mirror acts as a convex mirror of focal length

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Spherical Mirror Common Terms & Rays

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