Question

please tell fast please​

Answer 1

Answer:

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Explanation:

Following are the ways to obtain the focal length of the concave mirror:

A concave mirror is defined as the spherical mirror whose reflecting surface is curved inwards and follows laws of reflection of light

.The light rays coming from a distant object can be considered to be parallel to each other.If the image formed is real, inverted and very small in size, then the parallel rays of light meet the point in the front of the mirror.

The image formed by the convex lens is real and can be obtained on the screen

.f is used to denote the difference between the principal axis P and the focus F of the concave mirror.

Answer 2

$\huge\underline\mathbb\purple{ANSWER:}$

Which book are you following please mention the name of the book so that if I too have the book then I am able to help you out....???

Following are the ways to obtain the focal length of the concave mirror:

• A concave mirror is defined as the spherical mirror whose reflecting surface is curved inwards and follows laws of reflection of light.

• The light rays coming from a distant object can be considered to be parallel to each other.If the image formed is real, inverted and very small in size, then the parallel rays of light meet the point in the front of the mirror.

• The image formed by the convex lens is real and can be obtained on the screen.

• f is used to denote the difference between the principal axis P and the focus F of the concave mirror.

$\frac{1}{f} = \frac{1}{v} + \frac{1}{u}$

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