Question

please answer this question​

Answer 1

Answer:

b)

i) There is no SI units for refractive index, since it is a ratio of light velocity in material vs light velocity in vacuum, all velosity units have been cancelled out and the only thing left is the number that shows the ratio.

ii) Optically denser medium: In this medium speed of light is less. Thus, “optically denser medium”

iv) The refractive index of kerosene and water are 1.44 and 1.33 respectively. As kerosene has more refractive index than water, it is optically denser.

kerosene - denser , Water - rarer