Light Energy

Front

What is light energy?

Back

Light energy is a form of energy that travels in waves and can be seen by the human eye. It is responsible for the illumination of our surroundings.

Front

What happens to light when it passes through water?

Back

Light bends when it passes through water, a process known as refraction.

Front

What is reflection in terms of light?

Back

Reflection is the bouncing back of light when it hits a surface, such as a mirror or water.

Front

What is refraction?

Back

Refraction is the bending of light as it passes from one medium to another, like from air into water.

Front

What is a convex lens?

Back

A convex lens is a lens that is thicker in the middle than at the edges and can converge light rays to a point.

Front

What is a concave lens?

Back

A concave lens is a lens that is thinner in the middle than at the edges and diverges light rays.

Front

How does a shiny aluminum screen help keep a car cool?

Back

It reflects sunlight, preventing it from entering the car and heating the interior.

Front

What is the role of light in photosynthesis?

Back

Light energy is used by plants to convert carbon dioxide and water into glucose and oxygen.

Front

What is the difference between transparent, translucent, and opaque materials?

Back

Transparent materials allow light to pass through clearly, translucent materials allow some light to pass but scatter it, and opaque materials do not allow light to pass through.

Front

What is the speed of light?

Back

The speed of light in a vacuum is approximately 299,792 kilometers per second (or about 186,282 miles per second).