Concave Lens Group 3 Quiz
15 Questions
| Total Attempts: 275
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Questions and Answers
- 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.
Shadow
- 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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