3rd prep. Mirrors, and Lenses

What is the first law of light reflection?

• The angle of incidence is less than the angle of reflection.

• The angle of incidence equals the angle of reflection.

• The angle of incidence is twice the angle of reflection.

• The angle of incidence is greater than the angle of reflection.

What type of mirror is used for personal grooming?

• Spherical mirror

• Plane mirror

• Concave mirror

• Convex mirror

What is the focal length of a concave mirror if its radius of curvature is 20 cm?

• 10 cm

• 40 cm

• 20 cm

• 30 cm

Which type of lens diverges light rays?

• Convex lens

• Concave lens

• Biconcave lens

• Biconvex lens

What is the image formed by a convex lens when the object is placed beyond the center of curvature?

• Real and inverted

• Virtual and inverted

• Virtual and erect

• Real and erect

What is the purpose of a concave mirror in solar ovens?

• To create virtual images

• To scatter light

• To reflect light away

• To collect and concentrate sunlight

What type of image is always formed by a concave lens?

• Virtual and inverted

• Real and inverted

• Virtual and erect

• Real and erect

What is the distance between the focus and the optical center of a lens called?

• Center of curvature

• Radius of curvature

• Focal length

• Principal axis

What happens to light rays that pass through the focus of a convex lens?

• They diverge

• They converge

• They reflect

• They scatter

What is the effect of short-sightedness on vision?

• Can see far objects clearly

• Cannot see any objects clearly

• Can see near objects clearly

• Can see both near and far objects clearly