Spherical Lenses Quiz

What is a lens made up of?

• Glass and clear plastic

• Metal and wood

• Rubber and fabric

• Paper and cardboard

What is the optical center of of a lens?

• It is the point inside the lens that lies on the principle axis in the mid distance between its two faces

• The center of the spheres of origin of the surfaces

• The point where light converges

• The point where light diverges

What is the principal axis of a lens?

• An imaginary line passing through the center of the lens

• The line connecting the focal points

• The line connecting the centers of curvature passing by the optical center of the lens

• The line connecting the optic center and the aperture

What is the focal point of a convex lens?

• The center of the lens

• The point where light converges

• The point where light diverges

• The center of curvature

What is the focal length of a lens?

• The distance between the center of curvature and the aperture

• The distance between the focus and the center of curvature

• The distance between the principal axis and the optic center

• The distance between the focus and the optic center

What is the relationship between the radius of curvature and the focal length of a lens?

• R = 4f

• R = f

• R = 2f

• R = 3f

What happens to the light ray passing through the optic center of a lens?

• It bends away from the normal

• It bends towards the normal

• It refracts without any deviation

• It reflects

What is the use of a convex lens?

• To create a rainbow

• To concentrate the sun's rays onto its focal point

• To disperse light

• To create a virtual image

What type of lens is a magnifying glass?

• Concave lens

• Convex lens

• Plano-concave lens

• Plano-convex lens

What is a secondary axis?

• It is any line passes by the optical center of the lens except the principle axis

• It is the center of the lens.

• It is the center of the sphere

• It is the point of collection of light