A beam of light from a source L is incident normally on a plane mirror fixed at a certin distance x from the source. The beam is reflacted back as a spot on a scale placed just above the surce L. When the mirror is rotated through a small angle `theta` the spot of the light is found to move through a distance y on the scale. The angle `theta` is given by

A beam of light from a source L is incident normally on a plane mirror fixed at a certain distance x from the source. The beam is reflected back as a spot on a scale placed just above the source L. When the mirror is rotated through a small angle theta , the spot of the light is found to move through a distance y on the scale. The angle theta is given by

A beam of light from a source L is incident normally on a plane mirror fixed at a certain distance x from the source. The beam is reflected back as a spot on a scale placed just above the source L. When the mirror is rotated through a small angle theta , the spot of the light is found to move through a distance y on the scale. The angle theta is given by

A beam of light from a source L is incident normally on a plane mirror fixed at a certain distance x from the source. The beam is reflected back as a spot on a scale placed just above the source L. When the mirror is rotated through a small angle theta the spot of the light is found to move through a distance y on the scale. The angle theta is given by

A beam of light from a source L is incident normally on a plane mirrorr fixed at a certain distance x from the source. The beam is reflected back as a spot on a scale placed just above the source L . When the mirrorr is rotated through a small angle theta , the spot of the light is found to move through a distance y on the scale. The angle theta is given by :

A beam of liht from a souce L is incident normally on a plane mirror fixed at a centain distance x from the source The beam is reflected back as a spot on a scale placed just above the source L. When the mirror is rotated through at small angle theta , the spot of the light is found to move through a distance y on the scale.The angle theta is given by :

A light ray is incident normally on a plane mirror. What is its angle of incidence?

A light ray is incident normally on a plane mirror. What is the angle of incidence?

When mirror is rotated through an angle theta , a reflected ray from it moves through an angle of