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ICSE Class 10 Answered

  • Please explain with the help of ray diagram:-
  • An empty test tube placed in water in a beaker with mouth outside the water surface, shines like a mirror when seen at certain angles.
  • Asked by Vandana | 21 Jun, 2017, 08:57: PM
    answered-by-expert Expert Answer
    -An empty testude has air inside it.
    -It is placed inside a beaker which is filled with water.
    -That is why light travels from different media i.e air-water-air and the refelction of light occurs through the glass surface.
    -Therefore, the testube shines like a mirror. 
    Answered by Abhijeet Mishra | 22 Jun, 2017, 12:25: PM

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