RBSE Class 10 Science MCQs Chapter 9 Light: Reflection and Refraction

RBSE Class 10 Science Chemistry Chapter 9 Light: Reflection and Refraction MCQs (Objectives) are very important for students preparing for Board Exams. These MCQS have been prepared on the basis of important topics of Light : Reflection and Refraction

In this post, you will find high- quality, exam oriented MCQs with answers prepared according to the latest RBSE Class 10 Science syllabus.

Whether you are a student looking for quick revision or a teacher searching for readymade study material, this post is for you.

Light: Reflection and Refraction Objectives with Answers

 

Multiple Choice Questions

Put (√) mark against correct answer

 

 

1.A virtual and enlarged image is formed by

(a)  concave mirror                     

(b)  convex mirror

(c)  plane mirror                     

(d)  none of the above

Correct answer –(a)

Explanation – when object is placed between focus point and pole of the mirror, then image formed is virtual and enlarged and erect also.

 

2.For the formation of ray diagram, in case of a concave or convex mirror, the following rule should be kept in mind

(a)  a light ray passing through focus, becomes parallel to principal axis after reflection.

(b)  a light ray coming parallel to principal axis, passes through focus after reflection.

(c)  a light ray coming through centre of curvature, is reflected on the same path without any deviation.

(d)  all the above.

Correct answer –(d)

 

 

3.An object is placed between focus and concave mirror, image is formed at:

(a)  infinity                    

(b)  behind the mirror

(c)  focus                        

 (d)  centre of curvature

Correct answer –(b)

Explanation – the image is virtual , erect and enlarged.

4.A virtual and equal sized image is formed by

(a)  concave mirror                     

(b)  convex mirror

(c)  plane mirror                          

(d)  none of the above

Correct answer –(c)

 

5.A virtual and diminished image is formed by

(a)  concave mirror              

(b)  convex mirror

(c)  plane mirror                          

(d)  none of the above

Correct answer –(b)

 

 

6.An object is placed at focus of a concave mirror, image is formed at :

(a) infinity                     

 (b)behind the mirror

(c) focus                                

(d)centre of curvature

Correct answer –(a)

 

 

7.An object is placed between focus and centre of curvature of a concave mirror, image will be formed

(a) at infinity                        

(b)away from the C

(c)  between and C               

 (d)at C

Correct answer –(b)

 

 

8.An object is placed at centre of curvature of a concave mirror, image will be formed

(a) at infinity                        

(b)  away from the C

(c)  between and C                    

(d)  at C

Correct answer –(d)

 

 

9.An object is placed away from the centre of curvature of a concave mirror, image will be formed

(a) at infinity                               

(b)  away from the C

(c)  between fand C              

(d)  at C

Correct answer –(c)

 

 

10.Convex mirror always forms an image

(a) real, inverted and diminished      

(b)  virtual, inverted and diminished

(c)  virtual, erect and diminished             

(d)  virtual, erect and enlarged

Correct answer –(c)

 

 

 

11.In automobile’s mirror used to see the rear view, is

(a) concave mirror                      

(b)  place mirror

(c)  convex mirror                       

(d)  any spherical mirror

Correct answer –(c)

 

12.An object is placed away from 2f of a convex lens, image is formed

(a) at f                            

(b)  between f and 2f

(c)  at 2f                               

(d)  away from 2f

Correct answer –(b)

 

 

13.An object is placed at 2f of a convex lens, image is formed

(a) at f                            

(b)  between f and 2f

(c)  at 2f                        

(d)  away from 2f

Correct answer –(c)

 

 

14.An convex lens form the image of sun

(a) at f                            

(b)  between f and 2f

(c)  at 2f                               

(d)  away from 2f

Correct answer –(a)

 

 

15.An object is placed at 2f of a convex lens, the image formed is

(a)  real, inverted and diminished     

(b)  real, inverted and of same size

(c)  real, erect and enlarged          

(d)  virtual, erect and enlarged

Correct answer –(b)

 

16.An object is placed between focus and a concave mirror, image formed will be

(a) real, inverted and diminished             

(b)  virtual, inverted and diminished

(c)  virtual, erect and diminished             

(d)  virtual, erect and enlarged

Correct answer –(d)

 

 

17.An object is placed away from the centre of curvature of a concave mirror, image formed is

(a) real, inverted and diminished             

(b)  virtual, inverted and diminished

(c)  virtual, erect and diminished             

(d)  virtual, erect and enlarged

Correct answer –(a)

 

 

 

18.An object is placed between f and optical centre of a convex lens, the image formed is

(a)  real, inverted and diminished            

(b)  real, inverted and of same size

(c)  real, erect and enlarged               

(d)  virtual, erect and enlarged

Correct answer –(d)

 

 

19.An object is placed between f and 2f of a convex lens, the image formed is

(a)  real, inverted and diminished            

(b)  real, inverted and of same size

(c)  real, erect and enlarged               

(d)  virtual, erect and enlarged

Correct answer –(c)

 

 

20.An image formed by concave lens, is always

(a)  real, inverted and diminished            

(b)  real, inverted and of same size

(c)  real, erect and enlarged               

(d)  virtual, erect and diminished

Correct answer –(d)

 

 

21.A concave lens can form a real and inverted image, when

(a) object is placed away from 2f            

(b)  object is placed at 2f

(c)  object is placed between and f 2f

(d)  it can never form real and inverted image

Correct answer –(d)

 

 

22.The focal length of a convex lens is 20 cm, its power is

(a)  + 20 D                           

(b)  - 20 D

(c)  + 5 D                             

(d)  - 5 D

Correct answer –(c)

 

 

23.The focal length of a plane mirror is

(a)  1 m                                 

(b)  zero

(c)  infinite                            

(d)  50 cm

Correct answer –(c)

 

 

24.Which statement is correct about a concave mirror

(a)  for it value of ‘ ’      is always negative

(b)  for it value of ‘ ’     is always positive

(c)  it focal length is negative     

(d)  its focal length is positive

Correct answer –(c)

 

 

25.The velocity of light in vacuum is

(a)  8 × 10³ ms^-1                   

(b)  3 × 10⁶ ms^-1

(c)  3 × 10⁸ ms^-1                       

(d)  6 × 10³ ms^-1

Correct answer –(c)

 

 

 

26.  `\frac{sin⁡ i}{sin  ⁡r}`  was stated by

(a)  Archimedes                   

(b)  Snell

(c)  Newton                   

(d)  C.V. Raman

Correct answer –(b)

 

 

27.Value of refractive index does not depend on

(a)  angle of incidence          

(b)  substance of medium

(c)  temperature                                  

(d)  all the above

Correct answer –(a)

 

 

28.Value of refractive index does not depend on

(a)  reflection                       

(b)  diffraction

(c)  refraction                             

(d)  all the above

Correct answer –(c)

 

29.For a normal incidence the value of angle of reflection is

(a)  60⁰                            

(b)  90⁰

(c)  30⁰                                  

(d)  0⁰

Correct answer –(d)

 

 

30.If value of n₂₁ is 1.25, value of n₁₂ will be

(a)  0.625                                

(b)  0.4

(c)  0.8                                      

(d)  1.0

Correct answer –(c)

 

 

31.A concave mirror can form real and larger image of the object, when object is place 

(a)  at infinity                       

(b)  between mirror and focus

(c)  between focus and centre of curvature                 

(d)  away from centre of curvature

Correct answer –(c)

 

 

32.A concave mirror can form erect and larger image of the object, when object is place 

(a)  at infinity                       

(b)  between mirror and focus

(c)  between focus and centre of curvature                 

(d)  away from centre of curvature

Correct answer –(b)

 

 

33.In torches, search lights and headlights of vehicles the bulb is placed

(a)  very near to the focus of a concave reflector

(b)  very near to the focus of a convex reflector

(c)  between the focus and centre of curvature of concave reflector      

(d)  at the centre of the concave reflector

Correct answer –(a)

 

 

34.You want to see the full length image of a tree, you would like to use?

(a)  a plane mirror                       

(b)  a concave mirror

(c)  a convex mirror                                  

(d)  a concave or plane mirror

Correct answer –(c)

 

 

35.Magnification of rear view mirrors is

(a)  less than one                         

(b)  more than one

(c)  equal to one                            

(d)  dependent on the position of  object

Correct answer –(a)

 

 

36.The laws of reflection are applicable to

(a)  plane mirror                         

(b)  concave mirror

(c)  convex mirror                            

(d)  all the above

Correct answer –(d)

 

 

37.A mirror converges the sun-rays at a point 10 cm. Where would you place the object to get an image of same size?

(a)  at 5 cm in front of the mirror

(b)  at 10 cm in front of the mirror

(c)  at 20 cm in front of the mirror              

 (d)  at 40 cm in front of the mirror

Correct answer –(c)

 

 

38.The correct ray diagram, for the ray of light incidents on a concave mirror, is

(a)  fig (A)                            

(b)  fig (B)

(c)  fig (C)                               

(d)  fig (D)

Correct answer –(d)

 

 

39.When light from a point source is incident, which of the following can make a parallel beam of light

(a)  two plane mirrors placed at an angle of 60⁰                

(b)  concave mirror and concave lens

(c)  concave mirror and convex lens

 (d)  convex mirror and concave lens

Correct answer –(c)

 

40.At what distance would you like to place a convex lens working as a magnifying glass

(a)  lesser than f             

(b)  between fand 2f

(c)  at 2f                                      

(d)  away from 2f

Correct answer –(a)

 

 

41.The imaginary line passing through the centre of curvature and pole of the mirror is called

(a)  focal plane 

(b)  Principal axis

(c)  focal length             

(d)  radius of curvature

Correct answer –(b)

 

 

 

42.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 concave lens

(b) Concave mirror as well as convex lens

(c) Convex mirror as well as concave lens

(d) Two plane mirrors placed at 90°

Correct answer –(b)

 

 

43.Which of the following statement is true?

(a) A convex lens has 4 dioptre power having a focal length 0.25m

(b) A concave lens has 4 dioptre power having a focal length 0.25m

(c) A covex lens has -4 dioptre power having a focal length 0.25m

(d)A concave lens has -4 dioptre power having a focal length 0.25m

Correct answer –(a)

 

44.Focal length of a concave mirror is

(a) Negative

(b) Positive

(c) Depends on the position of image

(d) Depend on the position of object

Correct answer –(a)

45.If the image formed by a concave mirror is virtual , erect and magnified , then the object is placed

(a)beyond the centre of curvature

(b)beyond the pole of the mirror and the focus

(c)at the centre of curvature

(d)at the  focus

Correct answer- (b)

 

46.When a refracted ray is distracted from its original path , this displacement is called

(a) refraction

(b) reflection

(c) dispersion

(d) lateral displacement

Correct answer-(d)

47.Where should an object be placed so that a real and inverted image of the same size is obtained, using a convex lens

(a)between O and F

(b)at F

(c)at 2F

(d)at infinity

Correct answer- (c)

48.Lateral displacement on passing through a glass slab depends on

(a)angle of incidence

(b)thickness of glass slab

(c)both (a) and (b)

(d)neither (a)nor(b)

Correct answer- (c)

49.In case of normal incidence , what would be the angle of deviation through a glass slab

(a)maximum

(b)minimum

(c)0°

(d)90°

Correct answer- (c)

 

50.Focal length of a concave mirror depends upon

(a)Distance of image

(b)Distance of object

(c)Neither the distance of image nor the distance of object

(d)Both the distances of image and distance of object

Correct answer –(c )