Assessment: Light

Which of these objects is non-luminous (produces no light of its own)?

A ray of light hits a mirror at an angle of incidence of 62°. Find the angle of reflection.

A convex mirror has a focal length of +12 cm. An object is placed 24 cm in front of it (u = −24 cm). Find the image distance v.

An object is placed 2.5 m from a plane mirror. Find the total distance between the object and its image.

A dentist holds a small concave mirror close to a tooth to see a magnified, upright view. For this to work, the tooth (the object) must be placed:

A concave mirror produces a real image at v = −40 cm when the object is at u = −20 cm. Find the magnification.

Why does a cinema screen look equally bright from many different seats, unlike a mirror?

Why are convex mirrors commonly used as security mirrors in shops?

A concave mirror forms a real image at v = −60 cm when the object is placed at u = −40 cm. Find the focal length f.

Two plane mirrors, A and B, face each other 4 m apart. An object stands 1.5 m from mirror A. Find the distance behind mirror B at which the image of the object (formed by reflection in mirror B) appears.