Quiz on Light – Reflection and Refraction

What is the principal focus of a concave mirror?

• The point where light rays diverge

• The point where light rays converge

• The center of curvature

• The pole of the mirror

What is the relationship between the radius of curvature (R) and the focal length (f) of a spherical mirror?

• R = f/2

• R = 2f

• R = 3f

• R = f

Which type of mirror is used to produce an erect and enlarged image?

• Plane mirror

• Concave mirror

• Convex mirror

• Spherical mirror

What type of image does a convex mirror always produce?

• Real and erect

• Real and inverted

• Virtual and inverted

• Virtual and erect

What happens to light when it passes from a rarer medium to a denser medium?

• It stops

• It travels in a straight line

• It bends away from the normal

• It bends towards the normal

What is the nature of the image formed by a concave mirror when the object is placed at the focus?

• Real and inverted

• Enlarged

• Virtual and erect

• Highly diminished

What is the focal length of a convex mirror with a radius of curvature of 32 cm?

• 16 cm

• 32 cm

• 8 cm

• 64 cm

Which of the following is a use of concave mirrors?

• Bathroom mirrors

• Decorative mirrors

• Shaving mirrors

• Rear-view mirrors in vehicles

What is the image distance (v) for an object placed at infinity in a convex mirror?

• At the focus

• At the center of curvature

• At infinity

• Behind the mirror

What is the effect of refraction on the appearance of a pencil in water?

• It appears unchanged

• It appears displaced

• It appears longer

• It appears shorter