181. An endoscope is employed to view the internal parts of the body organ. It is based on the principle of

1. 1. Reflection

   
   
   

   2. Internal reflection

   
   
   

   3. Refraction

   
   
   

   4. Dispersion

   
   
   

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   N/A

   Correct Option: B

   N/A

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182. The plane surface of plano-convex lens of focal lengh f is silvered. It will behave as a

1. 1. Plane mirror

   
   
   

   2. Convex mirror of focal length 2 f

   
   
   

   3. Concave mirror of focal lengh f / 2

   
   
   

   4. None of the above

   
   
   

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   N/A

   Correct Option: C

   N/A

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183. An object is kept 5 cm in front of a concave mirror of focal length 15 cm. What will be nature of the image?

1. 1. Virtual, not magnified

   
   
   

   2. Virtual, magnified

   
   
   

   3. Real not magnified

   
   
   

   4. Real, magnified

   
   
   

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   N/A

   Correct Option: B

   N/A

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184. An object is placed at a distance of 40 cm in front of a concave mirror of focal length 20 cm the image produced is

1. 1. Virtual and inverted

   
   
   

   2. Real and erect

   
   
   

   3. Real, inverted and diminished

   
   
   

   4. Real, inverted and of the same size as the object

   
   
   

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   N/A

   Correct Option: D

   N/A

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185. In a compound microscope, the intermediate image is

1. 1. Virtual, erect and magnified

   
   
   

   2. Real, erect and magnified

   
   
   

   3. Real, inverted and magnified

   
   
   

   4. Virtual, erect and reduced

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: C

   N/A

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