41. A monochromatic beam of light passes from a denser to a rarer medium as a result its

1. 1. Velocity increases

   
   
   

   2. Velocity decreases

   
   
   

   3. Frequency decreases

   
   
   

   4. Wavelength decreases

   
   
   

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   N/A

   Correct Option: A

   N/A

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42. Two plane mirrors are inclined at a certain angle. A ray of light coming parallel to one of the mirrors is rendered parallel to the second mirror after two reflections The inclination between the mirror is

1. 1. 60°

   
   
   

   2. 90°

   
   
   

   3. 45°

   
   
   

   4. 30°

   
   
   

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   N/A

   Correct Option: A

   N/A

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43. A convex lens made of a material of refractive index 1.5 and having a focal length of 10 cm is immersed in a liquid of refractive index 3.0 The lens will behave as a

1. 1. Converging lens of focal length 10 cm

   
   
   

   2. Diverging lens of focal length 10 cm

   
   
   

   3. Diverging lens of focal length 30 cm

   
   
   

   4. None of the above

   
   
   

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   N/A

   Correct Option: B

   N/A

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44. A ray of light travelling inside a rectangular glass block of refractive index 2 is incident on the glass air surface at an angle of incidence of 45°. The refractive index of air is 1. The ray will

1. 1. Emerge into air without any deviation

   
   
   

   2. Be reflected back in to glass

   
   
   

   3. Be absorbed

   
   
   

   4. Emerged in to air with an angle of refraction equal to 90°

   
   
   

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   N/A

   Correct Option: D

   N/A

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45. Check the wrong statement (s)

1. 1. A concave mirror can give a virtual image

   
   
   

   2. A concave mirror can give a diminished virtual image

   
   
   

   3. A convex mirror can give a diminished virtual image

   
   
   

   4. All of the above

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: B

   N/A

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