Q: The refractive index of crown glass is close to 3/2. If the speed of light in air is c, then the speed of light in the crown glass will be close to
(a)(3/2)c
(b)(4/9)c
(c)(2/3)c
(d)(9/4)c
Correct Answer: (c)
The correct answer is (d) '(9⁄4) c'. This question from the General Studies domain tests knowledge of Miscellaneous.