The correct answer is Option 2: Refractive index.
What is the Refractive Index?
The refractive index (also called the index of refraction) is a dimensionless number that describes how fast light travels through a specific material compared to a vacuum. It is a measure of the bending ability of light when it transitions from one medium to another.
The mathematical formula for the refractive index ($n$) is:
$$n = \frac{c}{v}$$
Where:
$n$ = refractive index of the medium
$c$ = speed of light in a vacuum ($\approx 3 \times 10^8 \text{ m/s}$)
$v$ = speed of light in the medium
Because light travels fastest in a vacuum, the value of $n$ for any material is always greater than or equal to 1. For example, the refractive index of air is about 1.0003, water is 1.33, and diamond is 2.42. A higher refractive index means light travels slower in that medium and bends more sharply.
Important Questions from Motion
The motion of a particle of mass m is described by the relation, y = ut - 1⁄2 gt2, where u is the initial velocity of the particle. The force acting on the particle is
The motion of ______ body is an example of uniformly accelerated motion.
- in a particular direction is velocity.
Motion of an object is if its velocity is constant.
The motion of the body moving along a circular path is an example of ______.
