A ray of light strikes a plane mirror at an angle of incidence `45^@` as shown in Figure . After reflection,l the ray passes through a prism of refractive indes 1.5 whos apex angle is `4^@`. Through what angle must the mirror be rotated it total deviation of the ray be `90^@` ?

A ray of light strikes a plane mirror at an angle of incidence 45^@ as shown in the figure 9.115. After reflection, the ray of passess through a prism of refractive index 1.5 whose apex angle is 4^@ . Through what angle must the mirror be rotated if the total deviation of hte ray be 90^@ ?

When a ray of light strikes a plane mirror at an angle of 15^@ with the mirror, what will be the angle through which the ray gets deviated?

An incident ray strikes a plane mirror at an angle of 15^@ with the mirror. The angle between the reflected ray and the mirror is

A horizontal ray of light passes through a prism of index 1.50 and apex angle 4^(@) and then strikes a vertical mirror , as shown in the figure. Through what angle must the mirror be rotated if after reflection the ray is to be horizontal?

A horizontal ray of light passes through a prism of index 1.50 and apex angle 4^(@) and then strikes a vertical mirror , as shown in the figure. Through what angle must the mirror be rotated if after reflection the ray is to be horizontal?

A horizontal ray of light passes through a prism of index 1.50 and apex angle 4^(@) and then strikes a vertical mirror , as shown in the figure. Through what angle must the mirror be rotated if after reflection the ray is to be horizontal?