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A Light Ray Enters From Medium a to Medium B as Shown in Figure. The Refractive Index of Medium B Relative to a Will Be
By BYJU'S Exam Prep
Updated on: September 25th, 2023
(a) greater than unity
(b) less than unity
(c) equal to unity
(d) zero
A light ray enters from medium A to medium B as shown in Figure. The refractive index of medium B relative to A will be greater than unity.
- The ratio of the speed of light as it travels in a vacuum to that of the medium is known as the refractive index.
- Light tends to bend toward the normal when it moves from a rarer to a denser medium.
- Light has a tendency to deviate from the usual when it moves from a denser to a rarer medium.
- The figure makes it obvious that the light beam bends in the direction of normal.
- Therefore, the light beam is moving from a rarer to a denser medium.
- Compared to the denser medium, the rarer medium has a faster speed of light.
- To put it another way, if v1 is the speed of light in medium A and v2 is the speed of light in medium B, then v1 > v2
- The refracting index for the specified circumstance is if the refractive index is µ = v1/v2 > 1
Formula of Refractive Index
Refractive indexes have no dimensions. It is a measurement of how much slower a light wave would move through a substance than it would in a vacuum. The refractive index, denoted by the symbol n, is calculated by dividing the speed of light in a medium by the speed of light in vacuum. The refractive index formula is as follows:
n = c/v
Where,
c is the velocity of light in a vacuum (3 × 108 m/s)
n is the refractive index
v is the velocity of light in a substance
Summary:-
A Light Ray Enters From Medium a to Medium B as Shown in Figure. The Refractive Index of Medium B Relative to a Will Be (a) greater than unity (b) less than unity (c) equal to unity (d) zero
According to Figure, a light ray travels from medium A to medium B. When compared to medium A, medium B will have a refractive index greater than unity.
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