# Concave Lens Group 3 Quiz

15 Questions | Total Attempts: 275  Settings  This quiz will challenge you knowledge about our site and the lesson we post in our site

• 1.
Concave lens is also known as converging lens.
• A.

True

• B.

False

• 2.
Any lens that is "thicker in the center" than on the edges is convex lens.
• A.

True

• B.

False

• 3.
Concave lens is thinner at its center than its edges.
• A.

True

• B.

False

• 4.
Convex lens is also known as converging lens.
• A.

True

• B.

False

• 5.
Lenses are classified in to three.
• A.

True

• B.

False

• 6.
The point where all rays which enter the lens parallel to its axis are brought to a focus is called the ________ focus.
• A.

Principal

• B.

Focal

• C.

Center

• 7.
how many varieties of lens are there?
• A.

2

• B.

4

• C.

3

• 8.
Mirrors and lenses both have the ability to reflect or ______ light.
• A.

Reduce

• B.

Refract

• C.

Resurrect

• 9.
Lens that possesses at least one surface that curves ________ is a diverging lens.
• A.

Outwards

• B.

Sidewards

• C.

Inwards

• 10.
Any lens that is thicker in the center than on the edges is generally described as a ______ lens.
• A.

Concave

• B.

Convex

• C.

Diverging

• 11.
The image formed by a _______ lens is virtual, upright, and smaller than the object.
• A.

Concave

• B.

Convex

• C.

Convension

• 12.
The ______ formed by a concave lens is cannot be projected onto a screen.
• A.

Image

• B.

• C.

Reflection

• 13.
A similar point the same distance in front of the lens is called the len's _________ focus.
• A.

Double

• B.

Secondary

• C.

Binary

• 14.
The distance from the ______ of the lens to the principal focus is called the focal length.
• A.

Left

• B.

Center

• C.

Right

• 15.
A concave lens is thinner at its centre than at its edges, and is used to correct _____-sightedness.
• A.

Long

• B.

Far

• C.

Short

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