CSEC Physics - 07 Lenses

Front

What is total internal reflection?

Back

Total internal reflection occurs when light travels from a denser medium to a less dense medium and the angle of incidence is greater than the critical angle.

Front

What is a convex lens?

Back

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

Front

What type of lens do humans have in their eyes?

Back

Humans have a convex lens in their eyes.

Front

What does 'diverging' mean in optics?

Back

Diverging means to spread apart, as seen with concave lenses.

Front

What type of image does a convex lens produce when the object is beyond the focal point?

Back

A convex lens produces an inverted and larger image when the object is beyond the focal point.

Front

What is the critical angle?

Back

The critical angle is the angle of incidence above which total internal reflection occurs.

Front

What happens to light rays passing through a concave lens?

Back

Light rays passing through a concave lens diverge or spread apart.

Front

What is the focal point of a lens?

Back

The focal point is the point where parallel rays of light either converge (convex lens) or appear to diverge (concave lens) after passing through the lens.

Front

How does the shape of a lens affect its function?

Back

The shape of a lens determines whether it is converging (convex) or diverging (concave), affecting how it bends light.

Front

What is the difference between real and virtual images?

Back

Real images can be projected on a screen and are formed by converging light rays, while virtual images cannot be projected and are formed by diverging light rays.