JEE Main · PhysicsEasy
A light ray travels from a medium with refractive index to a medium with refractive index . What is the critical angle for this interface?
- A.
- B.
- C.
- D.
Show correct answer & step-by-step solution
Correct answer: A —
Solution
- The formula for the critical angle is .
- Given and .
- Substituting the values, .
- Therefore, .
- Hence the answer is (A).
Attempt this question & track your score
Sign up free to answer, get instant scoring, and let SolveGini track which Physics topics you need to revise.
Attempt & Track Free →More Ray Optics practice questions
- A concave mirror has a focal length of 20 cm. If an object is placed at a distance of 30 cm from the mirror, what is the
- The refractive index of glass with respect to air is 1.5. What is the speed of light in glass if the speed of light in a
- A thin convex lens has a power of 2.0 Diopters. What is its focal length in meters?
- Which of the following phenomena explains the formation of a rainbow?
- An object is placed at a distance of 10 cm from a convex lens of focal length 15 cm. What is the nature of the image?
- A point object is placed at a distance of 30 cm from a convex lens of focal length 20 cm. A convex mirror of radius of c
- A ray of light enters a glass slab of thickness 10 cm and refractive index 1.5 at an angle of 45 degrees. What is the la
- A thin prism of angle 6 degrees and refractive index 1.5 is combined with another thin prism of refractive index 1.7 to
- A fish in a pond at a depth of 20 cm looks up at a bird flying at a height of 30 cm above the water surface. What is the
- A biconvex lens has a focal length of 10 cm in air. If it is immersed in a liquid of refractive index 1.5, and the lens
- A thin prism of angle 6 degrees and refractive index 1.5 is combined with another thin prism of refractive index 1.7 to
- A concave mirror of focal length 10 cm is placed at a distance of 30 cm from a convex lens of focal length 15 cm. An obj