Advertisements
Advertisements
Question
The critical angle for glass-air interface is :
Options
24°
48°
42°
45°
Advertisements
Solution
42°
RELATED QUESTIONS
A total reflecting equilateral prism can be used to deviate a ray of light through:
What is meant by the refraction of light?
Why upper surface of water contained in a beaker and above eye level appears silvery?
A ray of light passes from water to air. How does the speed of light change?
During sunset and sunrise, the sun is seen when it is slightly below the horizon. Give reason.
A glass slab is placed over a page on which the word VIBGYOR is printed with each letter in its corresponding colour.
- Will the image of all the letters be in the same place?
- If not, the state which letter will be raised to the maximum. Give a reason for your answer.
What is the refractive index of water
Complete the ray diagram showing its emergence into the air after passing through the prism.

The speed of light in air is 3 × 108 ms-1. Calculate the speed of light in water. The refractive index of water is 4/3.
The velocity of light in diamond is 121000 kms-1. What is its refractive index?
