Question

A spherical mirror has a focal length of -10 cm. The mirror is likely to be ?

Pls urgent be quick ✌

Answer 1

concave mirror because it is in opposite direction for the incident ray as per rules

Answer 2

Answer:

Spherical mirrors has focal length of –ve 10 cm. what type of mirror is it?

Explanation:

Well your question is quiet clear, and so the answer will also be clear. The answer lies on the getting familiar with the fact and properties of both types of spherical mirror.

Now as the mirrors are spherical so it is obvious that they are not plane mirrors. The image quality generally differs in all three cases. A concave, convex and plane mirrors.

Now speaking of concave and convex types what makes then different is their focal length. So, you may either have a mirror with a positive focal length or one with negative focal length.

If the mirror is Concave type then its focal length will always be +Ve. But in case the focal length of the Mirror is –Ve, then it is a convex mirror.

So here as the focal length is -10 cm, so it is obvious that the mirror is Convex type of spherical mirror.