Removal Test

A concave mirror has a focal length of 15 cm. An object is placed 30 cm in front of the mirror. Determine the image distance.

A convex mirror has a focal length of -20 cm. The image is formed 10 cm behind the mirror. Find the object distance.

A convex lens has a focal length of 20 cm. An object is placed 40 cm in front of the lens. Determine the image distance.

A concave lens has a focal length of -15 cm. The image is formed 10 cm from the lens. Find the object distance.

A light ray travels from air (n₁= 1.00) into water (n₂= 1.33) at an incident angle of 30°. Find the angle of refraction in water.

A light ray passes from glass into water. The incident angle in glass (n₁= 1.50) is 40°, and the refracted angle in water 50°. Find the refractive index of water.

A light ray travels from glass (n₁= 1.50) to air (n₂= 1.00). Find the critical angle at which total internal reflection occurs.

A laser beam in water (n₁= 1.33) is incident at 50° on a water-air boundary (n₂= 1.00). Determine whether total internal reflection will occur.