LIGHT, Class X,, MCQ Part 1
MCQ'S
Students can solve NCERT Class 10 Science Light Reflection and Refraction Latest Exam Pattern Multiple Choice Questions with Answers to know their preparation level.
Question1. When light falls on a smooth polished surface, most of it
(a) is reflected in the same direction
(b) is reflected in different directions
(c) is scattered
(d) is refracted into the second medium
Answer: a
Q2. The image formed by reflection from a plane mirror is
(a) real and inverted
(b) virtual and erect
(c) real and erect
(d) virtual and inverted
Answer: b
3. If an incident ray passes through the focus, the reflected ray will
(a) pass through the pole
(b) be parallel to the principal axis
(c) retrace its path
(d) pass through the centre of curvature
Answer: b
4. The magnifying power of a concave lens is(a) always > 1
(b) always < 1
(c) always = 1
(d) can have any value
Answer: b
5. The image formed by a convex lens can be
(a) virtual and magnified
(b) virtual and diminished
(c) virtual and of the same size
(d) virtual image is not formed
Answer: a
6. A point object is placed at a distance of 20 cm from a convex mirror of a focal length of 20 cm. The image will form at:
(a) at infinity
(b) at focus
(c) at the pole
(d) behind the mirror
Answer: d
7. The focal length of a concave mirror is
(a) negative
(b) positive
(c) depends on the position of an object
(d) depends on the position of the image
Answer: a
8. If the power of a lens is – 2 D, what is its focal length?
(a) +50 cm
(b) -100 cm
(c) -50 cm
(d) +100 cm
Answer: c
9. A spherical mirror and a spherical lens each have a focal length of -10 cm. The mirror and the lens are likely to be
(a) both concave
(b) both convex
(c) the mirror is concave and the lens is convex
(d) the mirror is convex and the lens is concave
Answer: a
10. If the magnification produced by a lens has a negative value, the image will be
(a) virtual and inverted
(b) virtual and erect
(c) real and erect
(d) real and inverted
Answer: b
11. When the object is placed between f and 2f of a convex lens, the image formed is
(a) at f
(b) at 2f
(c) beyond 2f
(d) between O and f
Answer: c
12. Which mirror can produce a virtual, erect, and magnified image of an object?
(a) Concave mirror
(b) Convex mirror
(c) Plane mirror
(d) Both concave and convex mirrors
Answer: a
13. If the image is formed in front of the mirror, then the image distance will be
(a) positive or negative depending on the size of the object
(b) neither positive nor negative
(c) positive
(d) negative
Answer: d
14. A ray of light is traveling from a rarer medium to a denser medium. While entering the denser medium at the point of incidence, it
(a) goes straight into the second medium
(b) bends towards the normal
(c) bends away from the normal
(d) does not enter at all
Answer: b
15. A student does the experiment on tracing the path of a ray of light passing through a rectangular glass slab for different angles of incidence. He can get a correct measure of the angle of incidence and the angle of emergence by following the labeling indicated in the figure:
(a) I
(b) II
(c) III
(d) IV
Answer: d
16. The focal length of the plane mirror is
(a) At infinity
(b)Zero
(c) Negative
(d)None of these.
Answer: a
17. The image formed by the plane mirror is
(a) Real and erect
(b) Real and inverted
(c) Virtual and erect
(d) Virtual and inverted
Answer: c
18. A concave mirror gives a real, inverted, and same-size image if the object is placed
(a) At F
(b) At infinity At C
(d) Beyond C
Answer: c
(a)4m
(b) -40m
(c) -0.25m
(d)-25m
Answer: c
(a) At infinity
(b) Between F and C
(c) Between P and F
(d) At E
Answer: c
(a) Optically rarer
(b) Optically denser
(c) Optical density
(d) Refractive index
Answer: b
22. The optical phenomenon, of the twinkling of stars, is due to
(a) Atmospheric reflection
(b) Total reflection
(c) Atmospheric refraction
(d) Total refraction
Answer: c
23. Convex lens focus a real, point-sized image at focus, the object is placed
(a) At focus
(b) Between F and 2F
(c) At infinity
(d) At 2F
Answer: c
(a) Metre
(b) Centimeter
(c) Diopter
(d) M-1
Answer: c
(a) 20cm
(b) 10cm
(c) 40cm
(d) 5cm
Answer. b
Fill in the Blanks
1. Light shows the phenomena of reflection, refraction, and ………..
2. The speed of light in a vacuum is ………..
3. The power of a lens is the ………. of its focal length.
4. The SI unit of power is ………..
5. A ………. lens will always give a virtual, erect, and diminished image, irrespective of the position of the object.
6. A positive sign in the value of magnification indicates that the image is ………..
7. A ………. mirror is used as a head mirror by the doctors to concentrate light on the body parts to be examined.
8. No matter how far you stand from a spherical mirror, your image appears erect. The mirror may be ………..
Answers
1. Dispersion.
2. 3 x 108 m/s.
3. Reciprocal.
4. Diopter.
5. Concave.
6. Virtual.
7. Concave.
8. Plane or convex mirror.
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