Question

your school laboratory has one large window.to find the focal length of a concave mirror using one of the walls as the screen,the experiment may be performed

a)nera the wall opposite to the window

b)on the same wall as the window

c)on tyhe wall adjacent to the window

d)only on the table as per the laboratory arrangement

Answer 1

I think option D coz all is fixed we need not to do anything

Answer 2

Answer:

b is correct  answer 100%

Explanation: