Question

Assertion: Focal length of a convex mirror is taken as positive whereas that of
a concave mirror as negative. Reason: New Cartesian sign convention decides
whether a distance from the pole of a mirror is to be taken as positive or
negative.​

Answer 1

Answer:

The assertion and the reason are correct

Because of the image forms in front of the mirror the focal lenght will be negative and if the image is formed to the back of the mirror the focal lenght is positive

Answer 2

Answer: True

Explanation:

• The image forms in front of the mirror and focal length will be negative and if the image is formed behind the mirror the focal length will be positive.

• So, we can say that the assertion and the reason are correct for the given statement.
• Hence, the statement is true.

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