Exploring Light Refraction

What is the critical angle in total internal reflection?

• The critical angle is the angle of incidence at which light is completely absorbed.

• The critical angle is always 90 degrees.

• The critical angle is calculated using the formula θc = arcsin(n2/n1), where n1 > n2.

• The critical angle is calculated using the formula θc = n1/n2.

How does a convex lens affect the path of light rays?

• A convex lens diverges light rays away from each other.

• A convex lens converges light rays to a focal point.

• A convex lens has no effect on light rays.

• A convex lens reflects light rays back in the opposite direction.

What is the principle behind the formation of rainbows due to refraction?

• Rainbows occur due to the reflection of light on the surface of water.

• Rainbows form when light is absorbed by clouds.

• Rainbows are caused by the evaporation of water.

• Rainbows are formed due to the refraction and dispersion of light in raindrops.

Explain how optical fibers utilize total internal reflection.

• Optical fibers utilize total internal reflection to transmit light by reflecting it within a core that has a higher refractive index than the surrounding cladding.

• Total internal reflection occurs only in liquids, not in solids.

• Optical fibers use lenses to focus light instead of reflection.

• Optical fibers transmit light by absorbing it in the core.

Describe one application of refraction in everyday life.

• Refraction helps in making coffee taste better.

• Refraction is used in cooking to boil water faster.

• Refraction is applied in car engines to improve fuel efficiency.

• Eyeglasses use refraction to correct vision.