Check the below NCERT MCQ Questions for Class 10 Science Chapter 10 Light Reflection and Refraction with Answers Pdf free download. MCQ Questions for Class 10 Science with Answers were prepared based on the latest exam pattern. We have Provided Light Reflection and Refraction Class 10 Science MCQs Questions with Answers to help students understand the concept very well.
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Light Reflection and Refraction Class 10 MCQs Questions with Answers
Question 1.
Which of the following can make a parallel beam of light when light from a point source is incident on it?
(a) Concave mirror as well as convex lens
(b) Convex mirror as well as concave lens
(c) Two plane mirrors placed at 90° to each other
(d) Concave mirror as well as concave lens
Answer
Answer: (a) Concave mirror as well as convex lens
Question 2.
A 10 mm long awl pin is placed vertically in front of a concave mirror. A 5 mm long image of the awl pin is formed at 30 cm in front of the mirror. The focal length of this mirror is
(a) -30 cm
(b) -20 cm
(c) -40cm
(d) -60 cm
Answer
Answer: (b) -20 cm
Question 3.
Under which of the following conditions a concave mirror can form an image larger than the actual object?
(a) When the object is kept at a distance equal to its radius of curvature
(b) When object is kept at a distance less than its focal length
(c) When object is placed between the focus and centre of curvature
(d) When object is kept at a distance greater than its radius of curvature
Answer
Answer: (c) When object is placed between the focus and centre of curvature
Question 4.
The diagrams showing the correct path of the ray after passing through the
(a) II and III only
(b) I and II only
(c) I, II and III
(d) I, II and IV
Answer
Answer: (c) I, II and III
Question 5.
A light ray enters from medium A to medium B as shown in figure. The refractive index of medium B relative to A will be
(a) greater than unity
(b) less than unity
(c) equal to unity
(d) zero
Answer
Answer: (a) greater than unity
Question 6.
Beams of light are incident through the holes A and B and emerge out of box through the holes C and D respectively as shown in the figure. Which of the following could be inside the box?
(a) A rectangular glass slab
(b) A convex lens
(c) A concave lens
(d) A prism
Answer
Answer: (a) A rectangular glass slab
Question 7.
A beam of light is incident through the holes on side A and emerges out of the holes on the other face of the box as show in the figure. Which of the following could be inside the box?
(a) Concave lens
(b) Rectangular glass slab
(c) Prism
(d) Convex lens
Answer
Answer: (d) Convex lens
Question 8.
Which of the following statements is true?
(a) A convex lens has 4 dioptre power having a focal length 0.25 m
(b) A convex lens has -4 dioptre power having a focal length 0.25 m
(c) A concave lens has 4 dioptre power having a focal length 0.25 m
(d) A concave lens has -4 dioptre power having a focal length 0.25 m.
Answer
Answer: (a) A convex lens has 4 dioptre power having a focal length 0.25 m
Question 9.
Magnification produced by a rear view mirror fitted in vehicles
(a) is less than one
(b) is more than one
(c) is equal to one
(d) can be more than or less than one depending upon the position of the object in front of it.
Answer
Answer: (a) is less than one
Question 10.
Rays from Sun converge at a point 15 cm in front of a concave mirror. Where should an object be placed so that size of its image is equal to the size of the object?
(a) 15 cm in front of the mirror
(b) 30 cm in front of the mirror
(c) between 15 cm and and 30 cm in front of the mirror
(d) more than 30 cm in front of the mirror
Answer
Answer: (b) 30 cm in front of the mirror
Question 11.
A full length image of a distant tall building can definitely be seen by using
(a) a concave mirror
(b) a convex mirror
(c) a plane mirror
(d) both concave as well as plane mirror
Answer
Answer: (b) a convex mirror
Click here to get an answer to your question ✍️ Round off the decimal 11.047 to the nearest tenth.
Question 12.
In torches, search lights and headlights of vehicles the bulb is placed
(a) between the pole and the focus of the reflector
(b) very near to the focus of the reflector
(c) between the focus and centre of curvature of the reflector
(d) at the centre of curvature of the reflector
Answer
Answer: (b) very near to the focus of the reflector
Question 13.
The laws of reflection hold good for
(a) plane mirror only
(b) concave mirror only
(c) convex mirror only
(d) all mirrors irrespective of their shape
Answer
Answer: (d) all mirrors irrespective of their shape
Question 14.
The path of a ray of light coming from air passing through a rectangular glass slab traced by four students are shown as A, B, C and D in figure. Which one of them is correct?
(a) A
(b) B
(c) C
(d) D
Answer
Answer: (b) B
Question 15.
You are given water, mustard oil, glycerine and kerosene. In which of these media a ray of light incident obliquely at same angle would bend the most?
(a) Kerosene
(b) Water
(c) Mustard oil
(d) Glycerine
Answer
Answer: (d) Glycerine
Question 16.
Which of the following ray diagrams is correct for the ray of light incident on a concave mirror as shown in figure?
(a) Fig. A
(b) Fig. B
(c) Fig. C
(d) Fig. D
Answer
Answer: (d) Fig. D
Question 17.
Which of the following ray diagrams is correct for the ray of light incident on a lens shown in figure?
(a) Fig. A
(b) Fig. B
(c) Fig. C
(d) Fig. D
Answer
Answer: (a) Fig. A
Question 18.
A child is standing in front of a magic mirror. She finds the image of her head bigger, the middle portion of her body of the same size and that of the legs smaller. The following is the order of combinations for the magic mirror from the top.
(a) Plane, convex and concave
(b) Convex, concave and plane
(c) Concave, plane and convex
(d) Convex, plane and concave
Answer
Answer: (c) Concave, plane and convex
Question 19.
In which of the following, the image of an object placed at infinity will be highly diminished and point sized?
(a) Concave mirror only
(b) Convex mirror only
(c) Convex lens only
(d) Concave mirror, convex mirror, concave lens and convex lens
Answer
Answer: (d) Concave mirror, convex mirror, concave lens and convex lens
Question 20.
Light travel fastest in
(a) Water
(b) Air
(c) Glass
(d) Diamond
Answer
Answer: (b) Air
Question 21.
A student used a device (X) to obtain/focus the image of a well illuminated distant building on a screen (S) as shown alongside in the diagram. Select the correct statement about the device (X).
(a) This device is a concave lens of focal length 8 cm.
(b) This device is a convex mirror of focal length 8 cm.
(c) This device is a convex lens of focal length 4 cm.
(d) This device is a convex lens of focal length 8 cm.
Answer
Answer: (d) This device is a convex lens of focal length 8 cm.
Question 22.
A student obtains a sharp image of the distant window (W) of the school laboratory on the screen (S) using the given concave mirror (M) to determine its focal length. Which of the following distances should he measure to get the focal length of the mirror?
(a) MW
(b) MS
(c) SW
(d) MW- WS
Answer
Answer: (b) MS
Question 23.
The mirror having reflection surface curved outward
(a) plane mirror
(b) concave mirror
(c) convex mirror
(d) cylindrical mirror
Answer
Answer: (c) convex mirror
Question 24.
The mirror having reflecting surface curved inwards
(a) plane mirror
(b) convex mirror
(c) cylindrical mirror
(d) concave mirror
Answer
Answer: (d) concave mirror
Question 25.
The mirror used as rear-view mirror in vehicles
(a) convex mirror
(b) plane mirror
(c) cylindrical mirror
(d) concave mirror
Answer
Answer: (a) convex mirror
Question 26.
The deviation of light ray from its path when it travels from one transparent medium to another transparent medium is called
(a) reflection
(b) refraction
(c) dispersion
(d) scattering
Answer
Answer: (b) refraction
Question 27.
Convex lens is also known as
(a) converging lens
(b) diverging lens
(c) radial lens
(d) axial lens
Answer
Answer: (a) converging lens
Question 28.
The image which is formed behind the mirror
(a) real image
(b) virtual image
(c) blue image
(d) partial image
Answer
Answer: (b) virtual image
Fill in the blanks
1. When light falls on a surface and bounces back to the medium, the phenomena is called ……………..
Answer
Answer: reflection
2. According to laws of reflection, the angle of incidence is equal to angle of ……………..
Answer
Answer: reflection
3. When rays of light after reflection meet a point ………….. image is formed.
Answer
Answer: real
4. The dentists use ………….. mirror to see large images of teeth of patients.
Answer
Answer: concave
5. ……………. is ratio of height of image to height of object.
Answer
Answer: Magnification
6. Power of convex lens is positive and concave lens is ………………
Answer
Answer: negative
Match the following columns
Column I | Column II |
(a) Mirror having magnification always equal to one (m = 1) | (i) concave mirror |
(b) Mirror used to concentrate sunlight in reflecting solar cooker | (ii) refraction |
(c) Image can be obtained on screen | (iii) plane mirror |
(d) Bottom of a tank containing water appears to be raised due to | (iv) convex lens |
(e) The lens having power – 2D | (v) real image |
(f) The lens which is thicker at middle as compared to edges | (vi) concave lens |
(g) Mirror used as rear-view mirror in vehicles | (vii) convex mirror |
Answer
Answer:
Column I | Column II |
(a) Mirror having magnification always equal to one (m = 1) | (iii) plane mirror |
(b) Mirror used to concentrate sunlight in reflecting solar cooker | (i) concave mirror |
(c) Image can be obtained on screen | (v) real image |
(d) Bottom of a tank containing water appears to be raised due to | (ii) refraction |
(e) The lens having power – 2D | (vi) concave lens |
(f) The lens which is thicker at middle as compared to edges | (iv) convex lens |
(g) Mirror used as rear-view mirror in vehicles | (vii) convex mirror |
Complete the crossword below:
Across:
4. The deviation of light ray from its path when it travels from one medium to another
5. Magnification of plane mirror
8. Convex lens is also known as
Down:
1. Concave lens is also known as
2. Mirror used as rear view mirror
3. Mirror used by dentist
6. A point on principal axis of lens where all rays of light parallel to the principal axis meets or appear to meet.
7. The image which can be obtained on screen
Answer
Answer:
Across:
4. Refraction
5. One
8. Converging lens
Down:
1. Diverging lens
2. Convex
3. Concave
6. Focus
7. Real image
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