NTSE SAT Physics Light Reflection and Mirror MCQs

Question: Quantum theory of light was given by :

• a) Newton
• b) Plank
• c) Faraday
• d) None of these

Answer: Plank

Question: Which of the following correctly represents graphical relation between angle of incidence (i) and angle of reflection(r) ?

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: A convex mirror of focal length  f (in air) is immersed in a liquid The focal length  of the mirror in liquid will be:

• a)

  

• b)

  

• c) f
• d)

  

Answer: f

Question: An observer runs towards a plane mirror with a velocity x m/s. What is the velocity fo his image which will appear to move towards him ?

• a) 2 x m/s
• b)

  

• c) x m/s
• d)

  

Answer: 2 x m/s

Question: When a ray of light strikes a plane mirror at an angle of 150 with the mirror, what will be the angle through which the ray get deviated ?

• a) 1500
• b) 300  
• c) 750  
• d) None of these

Answer: 300  

Question: Which of the following correctly depicts reflections in case of plane mirrors inclined at 40° ?

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: Two parallel plane mirrors A and B are placed at a separation 10 cm as shown is figure. A ray incident on the corner of mirror B at an angle of incidence 450. Find the number of times rays is reflected from mirror A:

• a) 4
• b) 5
• c) 6
• d) 7

Answer: 5

Question: A virtual image larger than the object can be produced by :

• a) Convex mirror
• b) Concave mirror
• c) Plane mirror
• d) Concave lens

Answer: Concave mirror

Question: When a object is placed in front of convex mirror of focal length 20 cm at a distance 25 cm from the pole. The : (1) the image formed is erected (2) the image formed is inverted (3) the image formed is real (4) the image formed is virtual

• a) 2 and 4 are correct
• b) 2 and 3 are correct
• c) 1 and 3 are correct
• d) 1 and 4 are correct

Answer: 1 and 4 are correct

Question: Rainbow is formed due to :

• a) Reflection and dispersion of light through a water droplet
• b) Refraction and dispersion of light through a water droplet
• c) Only dispersion of light
• d) Only refraction of light

Answer: Refraction and dispersion of light through a water droplet

Question: A boy is moving towards a plane mirror with 5 cm/s. What will be the relative velocity of the boy w.r.t. the image of the boy :

• a) 5 cm/s
• b) 10 cm/s
• c) 15 cm/s
• d) 20 cm/s

Answer: 10 cm/s

Question: A spherical mirror and spherical lens have each focal length of -10cm. The mirror and lens are :

• a) Both convex
• b) Both concave
• c) Mirror is convex and lens in concave
• d) Mirror is concave and lens is convex

Answer: Both concave

Question: In a room lighted by an electric bulb, it is found that he shadow of the ceiling fan hung in the centre falling on a wall opposite to the door. What can you say about the position of the bulb ?

• a) On the wall having the door
• b) On the wall facing the door
• c) On the wall of your right as your enter the room
• d) On the wall on your left as you enter the room

Answer: On the wall on your left as you enter the room

Question: The linear magnification for a mirror is the ratio of the size of the image to the size of the object, and is denoted by m. Then m is equal to (symbols have their usual meanings) :

• a)

  

• b)

  

• c)

  

• d) None of these

Answer:

Question: Two plane mirrors are inclined at angles of 300, 400, 500 and 600, turn by turn. At which angle of the mirror there would be the maximum number of images ?      

• a) A 300 
• b) At 400 
• c) At 500 
• d) At 600

Answer: A 300 

Question: Which of the following correctly depicts the graphical variation in case of spherical mirror ?

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: A virtual image larger than the object can be produced by :

• a) Convex mirror
• b) Concave mirror
• c) Plane mirror
• d) Concave lens

Answer: Concave mirror

Question: Quantum theory of light was given by :

• a) Newton
• b) Plank
• c) Faraday
• d) None of these

Answer: Plank

Question: A boy is moving towards a plane mirror with 5 cm/s. What will be the relative velocity of the boy w.r.t. the image of the boy :

• a) 5 cm/s
• b) 10 cm/s
• c) 15 cm/s
• d) 20 cm/s

Answer: 10 cm/s

Question: Two plane mirrors are inclined at angles of 300, 400, 500 and 600, turn by turn. At which angle of the mirror there would be the maximum number of images ? 

• a)  A 300 
• b) At 400  
• c) At 500 
• d) At 600

Answer:  A 300