JEE MAIN - Physics (2002 - No. 3)
If two mirrors are kept at $${60^ \circ }$$ to each other, then the number of images formed by them is
$$5$$
$$6$$
$$7$$
$$8$$
स्पष्टीकरण
KEY CONCEPT : When two plane mirrors are inclined a each other at an angle $$\theta $$ then the number of the images of a point object placed between the plane mirrors is
$${{{{360}^ \circ }} \over \theta } - 1,\,\,if{{{{360}^ \circ }} \over \theta }$$ is even
$$\therefore$$ Number of images formed
$$ = {{{{360}^ \circ }} \over {{{60}^ \circ }}} - 1 = 5$$
$${{{{360}^ \circ }} \over \theta } - 1,\,\,if{{{{360}^ \circ }} \over \theta }$$ is even
$$\therefore$$ Number of images formed
$$ = {{{{360}^ \circ }} \over {{{60}^ \circ }}} - 1 = 5$$