156. Whose experiments proved that the speed of light was always the same?

1. 1. James Clark Maxwell

   
   
   

   2. Michelson and Marley

   
   
   

   3. Miller and Stanley

   
   
   

   4. Werner Heisenberg

   
   
   

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   N/A

   Correct Option: B

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157. Consider the following statements
     1. The focal length of the objective of a microscope is less than the focal length of the eyepiece
     2. The minimum distance between an object and its real image formed by a convex lens of focal length f is equal to 4f.
     Which of the statements given above is / are correct ?

1. 1. 1 only

   
   
   

   2. 2 only

   
   
   

   3. Both 1 and 2

   
   
   

   4. Neither 1 nor 2

   
   
   

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   N/A

   Correct Option: C

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158. When light enters from air to water, then its

1. 1. Frequency increases and speed decreases

   
   
   

   2. Frequency is same but the wavelength is smaller in water than in air

   
   
   

   3. Frequency is same but the wavelength is Larger in water than in air

   
   
   

   4. Frequency and wavelength both decreases

   
   
   

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   N/A

   Correct Option: B

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159. A lens, immersed in a liquid becomes invisible when

1. 1. The focal length of the lens is zero

   
   
   

   2. The focal length of the lens is infinite

   
   
   

   3. The refractive index of the lens is less than the refractive index of the liquid

   
   
   

   4. The refractive index of the lens is equal to the refractive index of the liquid

   
   
   

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   N/A

   Correct Option: D

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160. To have larger magnification by a telescope

1. 1. The objective should be of large focal length and the eyepiece should be of small focal length

   
   
   

   2. Both the objective and eyepiece should be of small focal length

   
   
   

   3. Both the objective and the eyepiece should be large focal length

   
   
   

   4. None of the above

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: A

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