Lenses are mainly used to make images of an object view, the word lens is derived from a lentil bean from the Latin language, most lenses are spherical lenses, their two surfaces are parts of spherical surfaces. In general, there are two types of spherical lenses. So, the lens that binds two spherical surfaces facing outward is known as a convex lens, while the lens that binds two spherical surfaces as they are curved inward is known as a concave lens, Convergent lenses can produce both real and virtual images whereas diving lenses can only produce virtual images, the line joining the centers of the spheres forming the lens surfaces is called the axis of the lens, usually the lens axis of the lens. The greater the effect a lens has on the rays of light, the more powerful it is said to pass through the physical center. So let's start this quiz and know interesting facts about the lens.
1. Which of the following lenses are used in projectors?
A. Convex lens
B. Concave lens
C. Bipolar lens
D. All of the above
2. Which type of image is created by the concave lens?
A. Upright and larger
B. Upright and smaller
C. Inverted and smaller
D. Inverted and larger
3. Which type of mirror is used in anti-shop-lifting-devices?
A. Concave mirror
B. Plane mirror
C. Convex mirror
D. None of these
4. Which lens is known as the converging lens?
A. Concave lens
B. Bipolar lens
C. Convex lens
D. All of the above
5. Which type of lens is used by short-sighted persons?
A. Convex
B. Concave
C. Cylindrical
D. Compound
6. If an object is kept 5 cm in front of a concave mirror of the focal length of 15 cm. What will be the nature of the image?
A. Virtual, not magnified
B. Virtual, magnified
C. Real, magnified
D. Real not magnified
7. Which type of image is formed by a concave lens irrespective of the position of the object?
A. Virtual, upright and diminished
B. Real, upright and diminished
C. Virtual, upright and magnified
D. Real, inverted and magnified
8. Which lens formed a real inverted and magnified image?
A. Plane mirror
B. Concave lens
C. Bipolar lens
D. Convex lens
9. Which lens can produce a natural image of an object?
A. Concave mirror
B. Bipolar mirror
C. Plane mirror
D. None of these
10. What is the nature of the image is formed by a thin lens?
A. Virtual, not magnified
B. Virtual, magnified
C. Virtual, upright and magnified
D. Real, inverted, same size
11. Which type of image is formed by the concave lens if the object is located beyond the focal point?
A. Virtual image
B. Real image
C. Magnified
D. None of these
12. Which lens will produce both real and virtual images?
A. Concave lens
B. Bipolar lens
C. Converging lens
D. None of these
13. Which of the following lens is known as a diverging lens?
A. Plane lens
B. Convex lens
C. Bipolar lens
D. Concave lens
14. What is the SI unit of Lens?
A. Meter
B. Dioptre
C. Second
D. None of these
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