Lens

The video tutorial discusses how light converges or diverges from a single point using lenses. It explains that lenses for optical light are typically made from glass or hard plastic and have been utilized for over 3000 years.

What happens to light when it converges?

• It spreads out.

• It focuses to a point.

• It changes color.

• It becomes invisible.

Which material is commonly used to make optical lenses?

• Metal

• Wood

• Paper

• Glass

What is another material, besides glass, used for making lenses?

• Ceramic

• Hard plastic

• Fabric

• Rubber

For how long have lenses been in use?

• 2000 years

• 1000 years

• 500 years

• 3000 years

What is the primary function of a lens in optics?

• To change the color of light

• To focus or spread light

• To block light

• To reflect light