If speed of light in air is 3 x 10^8s m/s, the speed of light in glass (with refractive index 1.5) would be

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Q: 3 (NDA-I/2014)
If speed of light in air is 3 x 10^8s m/s, the speed of light in glass (with refractive index
1.5) would be

question_subject: 

Science

question_exam: 

NDA-I

stats: 

0,18,16,18,5,5,6

keywords: 

{'refractive index': [0, 1, 1, 5], 'glass': [0, 0, 1, 4], 'speed': [0, 1, 2, 0], 'light': [16, 4, 34, 62], '8s': [0, 0, 0, 2], 'air': [1, 0, 0, 0]}

The correct answer is option 1, which states that the speed of light in glass (with refractive index 1.5) would be 2 x 10^8 m/s.

The speed of light changes when it travels through different materials due to a property called refractive index. The refractive index of a material is the ratio of the speed of light in a vacuum to the speed of light in that material. In this case, the refractive index of the glass is 1.5.

To calculate the speed of light in the glass, we can use the formula: speed of light in vacuum / refractive index = speed of light in the material. In this formula, the speed of light in a vacuum is given as 3 x 10^8 m/s.

So, by substituting the values into the formula, we get: 3 x 10^8 m/s / 1.5 = 2 x 10^8 m/s.

Therefore, the correct answer is option 1, which states the speed of light in glass (with refractive index 1.5) is 2 x 10^8 m/s.

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