wiz-icon
MyQuestionIcon
MyQuestionIcon
4
You visited us 4 times! Enjoying our articles? Unlock Full Access!
Question

The refractive index of water and glass are 1.2 and 1.5 with respect to air, respectively. Calculate the refractive index of glass with respect to water. (Take speed of light in air, c = 3 × 108 m/s)

A
1.5
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
1.25
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
1.75
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B 1.25
We know that,
Refractive index of medium 2 with respect to medium 1, 1μ2=sped of light in medium 1speed of light in medium 2

We have to find the refractive index of glass with respect to water, so according to the above equation first we need to find the speed of light in water and glass.

Given, Speed of light in air =3×108m/s
So, Refractive index of water with respect to air,

airμwater=sped of light in airspeed of light in water
1.2 = 3 × 108speed of light in waterTherefore, speed of light in water=2.5×108 m/s
Similarly, Refractive index of glass with respect to air,airμglass=sped of light in airspeed of light in glass
1.5 = 3 × 108speed of light in glassTherefore, speed of light in glass=2×108 m/sHence, Refractive index of glass with respect to water is waterμglass=sped of light in waterspeed of light in glass = 2.5 × 1082 × 108 =1.25

flag
Suggest Corrections
thumbs-up
23
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Snell's Law and Refractive Index
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon