Two plane mirros are inclined at an anle `theta`. It is found that a ray incident on one mirror at any angle is rendered paralle ot itself after reflection from both the mirrors. The value of `theta` is

Two plane mirrors are inclined at an angle theta to one another. A ray of light incident on the first mirror and parallel to the second mirror is reflected from the second mirror parallel to the first mirror. What is the value of theta ?

Two plane mirrors are inclined at angle theta .A ray of light is incident on one mirror at an angle of incidence.i.The rayis refelected from this mirror,falls on the second mirror from where it is refleced parallel to the first mirror .What is the value of i,the angle of incident in term of theta ?

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

Two plane mirrors are placed at an angle theta so that a ray parallel to one mirror gets reflected parallel to second mirror after two consecutive reflections .The value of theta will be-