Light Reflection & Vision

Front

What is the principle of reflection in physics?

Back

The principle of reflection states that when light rays strike a reflective surface, they bounce off at the same angle at which they hit the surface, known as the angle of incidence.

Front

What is a mirror and how does it work?

Back

A mirror is a smooth surface that reflects light. It works by reflecting light rays that hit its surface, allowing us to see images of objects in front of it.

Front

What is the role of the brain in interpreting reflected images?

Back

The brain processes the signals received from the eyes and interprets them, allowing us to perceive reflected images as they appear in their correct orientation.

Front

What materials are considered good reflectors of light?

Back

Good reflectors of light include shiny metals, such as aluminum and silver, which have smooth surfaces that reflect light effectively.

Front

What is a lens and how does it function in optics?

Back

A lens is a transparent optical device that refracts light rays to focus or disperse them, forming images. Lenses can be convex (converging) or concave (diverging).

Front

How do fiber optics work to transmit light?

Back

Fiber optics use thin strands of glass or plastic to transmit light signals over long distances. The light is kept within the fiber by total internal reflection.

Front

What is total internal reflection?

Back

Total internal reflection occurs when a light ray hits the boundary of a medium at an angle greater than the critical angle, causing it to reflect entirely back into the medium.

Front

What is the difference between a convex lens and a concave lens?

Back

A convex lens is thicker in the center and converges light rays to a focal point, while a concave lens is thinner in the center and diverges light rays.

Front

What is the critical angle in optics?

Back

The critical angle is the minimum angle of incidence at which total internal reflection occurs when light travels from a denser medium to a less dense medium.

Front

How does light behave when it passes through a lens?

Back

When light passes through a lens, it bends (refracts) due to the change in speed as it moves from air into the lens material, allowing it to focus or spread out.