A ray reflected successively from two plane mirrors incline at a certain angle undergoes a deviation of `240^@`. Then the number of images observable is

A ray reflected successively from two plane mirrors inclined at a certain angle undergoes a deviation of 240^@ . The number of observable images is

A ray reflected successively from two plane mirrors inclined at a certain angle (lt 90^(@)) undergoes a deviation of 300^(@) . The number of images observable are:

A ray reflected successively from two plane mirrors inclined at a certain angle (lt 90^(@)) undergoes a deviation of 300^(@) . The number of images observable are:

A ray reflected successively from two plane mirrors inclined at a certain angle (lt 90^(@)) undergoes a deviation of 300^(@) . The number of images observable are:

Two plane mirrors are inclined at an angle of 30^@ symmetrically , the number of images formed are ____

If two plane mirrors are inclined at angle 0 to each other as shown, than angle of deviation of incident ray is