Question

In order to determine the focal length of a concave mirror by obtaining the image of distant object on screen,the position of screen should be: a.parallel to plane of concave mirror b.perpendicular to plane of concave mirror c.inclined at an angle 60° to plane of mirror d.in any direction with respect to the plane of concave mirror​

Answer 1

Answer:

the position of screen should be parallel to plane of concave mirror

Explanation:

When object is placed at large distance from the mirror then the image will form in focal plane

so we will say that

$\frac{1}{d_i} + \frac{1}{d_o} = \frac{1}{f}$

here we will say that object distance is large with respect to mirror

so we have

$d_o$ = infinite

now we have

$\frac{1}{d_i} + 0 = \frac{1}{f}$

$d_i = f$

so image will form in the focal plane of the mirror and hence we must have to put the screen in the focal plane.

so focal plane is always parallel to the plane of mirror

#Learn

Topic : Concave mirror

https://brainly.in/question/1723393

Answer 2

Explanation:

option a) is correct....,......,............