Answer:
C is the correct answer.
Step-by-step explanation:
we have given about light and we have to compare the speed of light in air as well as in glass. So let's take the expression of refractive index of glass. Suppose we are representing a refractive index of glass with respect to air. So this will be equal to the fraction or the ratio of the speed of light in air divided by the speed of light in glass. Hence we get the expression in the modified form as speed of light in glass is equal to speed of light in air, divided by the refractive index of glass with respect to air. So obviously when we consider the refractive index of class with respect to air, it is a number which is more than one. Hence from equation number A we get that the speed of light in glass will be less than that speed of light in air. Hence we can get it the correct answer. As the choice number C means the answer is less. This is our final answer.
Thank you.