Optics

Front

What is refraction?

Back

Refraction is the bending of light as it passes from one medium to another due to a change in its speed.

Front

What does a mirror do to light?

Back

A mirror reflects light rather than refracting it.

Front

Define a virtual image.

Back

A virtual image is an image that cannot be projected onto a screen because the light rays do not actually converge; it appears to be located behind the mirror or lens.

Front

What is a real image?

Back

A real image is formed when rays of light actually converge and can be projected onto a screen.

Front

What is a convex lens?

Back

A convex lens is a lens that is thicker in the center than at the edges and converges light rays that pass through it.

Front

What type of image is formed by a convex lens when the object is placed beyond the focal point?

Back

A real and inverted image is formed when the object is placed beyond the focal point of a convex lens.

Front

What happens to light rays when they pass through a concave lens?

Back

Light rays diverge when they pass through a concave lens.

Front

What is the focal point of a lens?

Back

The focal point is the point where parallel rays of light either converge (in a convex lens) or appear to diverge from (in a concave lens).

Front

How does the size of a virtual image compare to the object?

Back

A virtual image is typically larger than the object when formed by a convex lens.

Front

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

Back

A convex lens converges light rays, while a concave lens diverges light rays.