Class 10 Science MCQ Chapter 10 Light- Reflection and Refraction, Class 10 Science MCQ Question Answer, Class 10 Science Multiple Choice Question Answer to each chapter is provided in the list of SCERT Science Class 10 Objective Types Question Answer so that you can easily browse through different chapters and select needs one. Class 10 Science MCQ Chapter 10 Light- Reflection and Refraction Question Answer can be of great value to excel in the examination.
SCERT Class 10 Science MCQ Chapter 10 Light- Reflection and Refraction
SCERT Class 10 General Science MCQ Chapter 10 Light- Reflection and Refraction Notes covers all the exercise questions in SCERT Science Textbooks. The NCERT Class 10 Science MCQ Chapter 10 Light- Reflection and Refraction provided here ensures a smooth and easy understanding of all the concepts. Understand the concepts behind every chapter and score well in the board exams.
Light- Reflection and Refraction
Chapter – 10
Multiple Choice Questions & Answers
1. The ratio of focal length to the radius of curvature of a spherical mirror will be-
(a) 0.5
(b) 1
(c) 2
(d) 3
Ans: (a) 0.5
2. The image formed by concave mirrors-
(a) Always real.
(b) Always virtual.
(c) May be both real and virtual.
(d) None of these.
Ans: (c) May be both real and virtual.
3. The image formed by convex mirrors-
(a) Real, enlarged.
(b) Real, diminished.
(c) Virtual, enlarged.
(d) Virtual, diminished.
Ans: (d) Virtual, diminished.
4. The mirror used as rear-view mirrors in vehicles-
(a) Convex mirror.
(b) Concave mirror.
(c) Plane mirror.
(d) None of these.
Ans: (a) Convex mirror.
5. Image formed by plane mirrors-
(a) Real, inverted, diminished.
(b) Virtual erect enlarged.
(c) Virtual, erect, of same size as object.
(d) Virtual, erect, diminished.
Ans: (c) Virtual, erect, of same size as object.
6. Which of the following mirrors has the widest field of view-
(a) Plane.
(b) Convex.
(c) Concave.
(d) None of these.
Ans: (b) Convex.
7. To form a real image of same size as the object by a concave mirror, the object should be placed-
(a) Between. the pole and the principal focus.
(b) Between the principal focus and the centre of curvature.
(c) At the centre of curvature.
(d) Beyond centre of curvature.
Ans: (c) At the centre of curvature.
8. For which of the following positions of the object, a concave mirror does not form a real, inverted image-
(a) At infinity.
(b) Between the principal focus and centre of curvature.
(c) Beyond centre of curvature.
(d) Between focus and the pole.
Ans: (d) Between focus and the pole.
9. A spherical mirror forms image for an object at infinity at –
(a) Centre of curvature.
(b) Principal focus.
(c) Between principal focus and the centre of curvature.
(d) Between focus and pole.
Ans: (b) Principal focus.
10. For an object placed anywhere between infinity and pole of a convex mirror, the mirror produces an image-
(a) At the principal focus.
(b) Between principal focus and centre of curvature.
(c) At the centre of curvature.
(d) Between principal focus and pole.
Ans: (d) Between principal focus and pole.
11. For an object placed at the principal focus of a concave mirror, the position of the image formed is-
(a) At the centre of curvature.
(b) Beyond centre of curvature.
(c) At infinity.
(d) At principal focus.
Ans: (c) At infinity.
12. The position of the image formed by a concave mirror for an object placed at the centre of curvature is –
(a) Centre of curvature.
(b) Infinity.
(c) Principal focus.
(d) Beyond centre of curvature.
Ans: (a) Centre of curvature.
13. For a spherical mirror, to get a highly diminished image, the object should be placed
(a) At principal focus.
(b) At infinity.
(c) Beyond centre of curvature.
(d) Between principal focus and the pole.
Ans: (b) At infinity.
14. In a concave mirror, to get a highly enlarged image the object should be placed-
(a) At infinity.
(b) All centre of curvature.
(c) Be tween centre of curvature and principal focus.
(d) At principal focus.
Ans: (d) At principal focus.
15. The image formed by convex lenses-
(a) Always real.
(b) Always virtual.
(c) May be both real and virtual.
(d) None of these.
Ans: (c) May be both real and virtual.
Very Short & Short Type Questions and Answers:
1. What is centre of curvature of a spherical mirror?
Ans: The centre of the sphere of which the reflecting surface of a spherical mirror forms a part is called the centre of curvature of the mirror.
2. What do you mean by the focal length of a spherical mirror?
Ans: The distance between the pole and principal focus of a spherical mirror is called focal length of the mirror.
3. Define principal focus of a concave mirror?
Ans: Rays parallel to the principal axis after getting reflected by a concave mirror converge at a point on the principal axis. This point is called principal focus of a concave mirror.
4. Define principal focus of a convex mirror?
Ans: Rays parallel to the principal axis after getting reflected by a convex mirror appear to diverge from a point on the principal axis. This point is called principal focus of a convex mirror.
5. What is refraction of light?
Ans: Light travelling through a medium when enters obliquely into another medium, the direction of propagation of light changes in the second medium. This phenomenon is known as refraction light.
6. State the Snell’s law of refraction of light.
Ans: The ratio of sine of angle of incidence to the sine of angle of refraction is a constant, for the light of a given colour and for the given pair of media. This law is known as Snell’s law of refraction.
7. Express the refractive index of medium 2 with respect to medium 1 with the help of an equation.
Ans: n₂₁ = Speed of light in medium 1/ Speed of light in medium 2
8. What does absolute refractive index or refractive index of a medium mean?
Ans: It is the ratio of speed of light in air to the speed of light in the medium.
9. Refractive index of water is 1.33. What does this mean?
Ans: This mean that the ratio of speed of light in air to the speed of light in water is 1.33.
10. Define principal focus of convex lens.
Ans: Rays parallel to the principal axis after getting reflected by a convex lens converge at a point on the principal axis. This point is called principal focus of a convex lens.
11. Define principal focus of convex lens.
Ans: Rays parallel to the principal axis after getting refracted by a concave lens appear to diverge from a point on the principal axis. This point is called the principal focus of a concave lens.
12. Define power of a lens.
Ans: The degree of convergence or divergence of light rays achieved by a lens is called its power.
13. What is the SI unit of power of a lens?
Ans: Dioptre.
14. The refractive index of diamond is 2.42. What is the meaning of this statement?
Ans: This means that the ratio between the speed of light in vacuum and the speed of light in diamond is 2.42.
15. Define 1 diopter of power of a lens.
Ans: Power of a lens of focal length 1m is called 1 diopter.
16. Name the type of mirror used in the following situations.
(a) Headlight of a car.
(b) Rearview mirror of a vehicle.
(c) Solar furnace.
Ans: (a) Concave mirror.
(b) Convex mirror.
(c) Concave mirror.
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