Spherical Lenses -Multiple Choice Questions Quiz

Question 1: What is a spherical lens?

(a) A lens with a flat surface
(b) A lens with a curved surface
(c) A lens with no focal length
(d) A lens with a hole in the center

Question 2: What type of spherical lens converges light rays to a single point?

(a) Convex lens
(b) Concave lens
(c) Biconvex lens
(d) Plano-concave lens

Question 3: What type of spherical lens causes light rays to diverge as if coming from a point behind the lens?

(a) Convex lens
(b) Concave lens
(c) Biconvex lens
(d) Plano-concave lens

Question 4: Which spherical lens has a thicker center and thinner edges?

(a) Convex lens
(b) Concave lens
(c) Biconvex lens
(d) Plano-concave lens

Question 5: What is the focal length of a lens?

(a) The distance from the lens to the object being observed
(b) The distance from the lens to the image formed by the lens
(c) The distance between the two lens surfaces
(d) The distance from the lens to the light source

Question 6: When an object is placed beyond the focal point of a convex lens, what type of image is formed?

(a) Real, inverted, and enlarged
(b) Real, inverted, and reduced
(c) Virtual, upright, and enlarged
(d) Virtual, upright, and reduced

Question 7: In a concave lens, the focal length is _______.

(a) Positive
(b) Negative
(c) Zero
(d) Infinite

Question 8: What type of image is formed when an object is placed between the focal point and the convex lens?

(a) Real, inverted, and enlarged
(b) Real, inverted, and reduced
(c) Virtual, upright, and enlarged
(d) Virtual, upright, and reduced

Question 9: What is the shape of a plano-convex lens?

(a) Flat on both sides
(b) Convex on both sides
(c) Concave on both sides
(d) Flat on one side and convex on the other

Question 10: In a biconcave lens, the two surfaces are _______.

(a) Both concave
(b) Both convex
(c) One convex and one flat
(d) One concave and one flat

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Results:

Total score: /10

Answer key:

Question 1: b

Question 2: a

Question 3: b

Question 4: c

Question 5: b

Question 6: d

Question 7: b

Question 8: a

Question 9: d

Question 10: a