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Which of the following causes refraction of light?

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in Physics – Class 12 by (135k points)
Which of the following causes refraction of light?

(a) Change in the density of light from one medium to another

(b) Change in viscosity of light from one medium to another

(c) Change in the speed of light from one medium to another

(d) Change in direction of light from one medium to another

This question was addressed to me in a job interview.

This interesting question is from Reflection of Light by Spherical Mirrors topic in portion Ray Optics and Optical Instruments of Physics – Class 12

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Best answer
Right option is (c) Change in the speed of light from one medium to another

For explanation I would say: Light travels at different speeds in a different medium. The bending or refraction of light occurs due to the change in the speed of light as it passes from one medium to another. Other statements are not true regarding the refraction of light.

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