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Class 10
Physics :-NCERT Solution - Light Reflection and Refraction

Page No 176:
Question 2:

Light enters from air to glass having refractive index 1.50. What is the speed of light in the glass? The speed of light in vacuum is 3 × 108 m s−1.


Answer:

Refractive index of a medium nm is given by,

Speed of light in vacuum, c = 3 × 108 m s−1

Refractive index of glass, ng = 1.50

Speed of light in the glass,


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