Light: Straight Line, Reflection, Refraction

Front

What is light?

Back

Light is a form of energy that travels in waves and can be seen by the human eye.

Front

What does it mean for light to travel in a straight line?

Back

Light travels in straight lines unless it interacts with an object or medium that causes it to change direction.

Front

What is reflection of light?

Back

Reflection is the bouncing back of light when it hits a surface.

Front

What is refraction of light?

Back

Refraction is the bending of light as it passes from one medium to another, changing its speed.

Front

What is a ray of light?

Back

A ray of light is a straight line that represents the path along which light energy travels.

Front

What is a normal line in reflection?

Back

The normal line is an imaginary line perpendicular to the surface at the point of incidence where light strikes.

Front

What is the law of reflection?

Back

The law of reflection states that the angle of incidence is equal to the angle of reflection.

Front

What happens to light when it hits a mirror?

Back

When light hits a mirror, it reflects off the surface according to the law of reflection.

Front

What is a lens?

Back

A lens is a transparent object that refracts light to converge or diverge rays.

Front

What is the difference between convex and concave lenses?

Back

Convex lenses converge light rays to a point, while concave lenses diverge light rays.