136. Consider the following statements
     1. Light waves can travel in vacuum
     2. Light waves can be refracted
     3. Light waves are electro magnetic
     Which of the statements given above are correct?

1. 1. 1, 2 and 3

   
   
   

   2. 2 and 3 only

   
   
   

   3. 1 and 3 only

   
   
   

   4. 1 and 2 only

   
   
   

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   N/A

   Correct Option: A

   N/A

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137. Assertion (A) : In a motion picture usually 24 frames are projected every second over the whole length of the film
     Reason (R) : Am image formed on the retina of eye persists for about 0./s after the removal of stimulus.
     Codes:

1. 1. Both A and R are and R is the correct explanation of A

   
   
   

   2. Both A and R are true but R is not the correct explanation of A

   
   
   

   3. A is true but R is false

   
   
   

   4. A is false but R is true

   
   
   

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   N/A

   Correct Option: C

   N/A

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138. A convex mirror is used to form an image of a real object. The image

1. 1. Always lies between the pole and the focus

   
   
   

   2. I diminished in size

   
   
   

   3. is erect

   
   
   

   4. All of the above

   
   
   

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   N/A

   Correct Option: D

   N/A

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139. The least distance of distinct vision is 25 cm. The focal length of a convex lens is 5 cm It can act as simple microscope of magnifying power

1. 1. 4

   
   
   

   2. 5

   
   
   

   3. 6

   
   
   

   4. none of these

   
   
   

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   N/A

   Correct Option: C

   N/A

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140. One cannot see through fog because

1. 1. Fog absorbs light

   
   
   

   2. The refractive index of fog is infinite

   
   
   

   3. Light suffers total reflection at the droplets in fog

   
   
   

   4. Light is scattered by the droplets in fog

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: D

   N/A

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