Two plane mirrors at an angle such that a ray incident on a mirror undergoes a total deviation of `240^(@)` after two reflections:

Two plane mirrors are inclined to each other with their reflecting daces making acute angle. A light ray is incident on one plane mirror. The total deviation after two successive reflections is :

Two plane mirror are inclined at an angle theta . A light ray incident on one of the mirror undergoes multiple reflections. The angle of incidence on the first mirror is 15^(@) . After reflection from the second mirror, if the light ray retraces its path, determine the volue of theta .

Two plane mirrror are inclined to each other at 70^(@) . A ray of light is incident on one mirror. They ray after two reflections will undergo a total deviation of :

Two plane mirrror are inclined to each other at 70^(@) . A ray of light is incident on one mirror. They ray after two reflections will undergo a total deviation of :

Two plane mirrors are inclined at 70^@ . A ray incident on one mirror at incidence angle theta after reflection falls on the second mirror and is reflected from there parallel to the first mirror, The value of theta is

Two plane mirrors are inclined at 70^@ . A ray incident on one mirror at incidence angle theta after reflection falls on the second mirror and is reflected from there parallel to the first mirror, The value of theta is