Using Light: Concave and Convex Lenses

The video tutorial explains what lenses are, their uses in everyday objects like eyeglasses and cameras, and their properties as transparent materials that bend light. It distinguishes between the two main types of lenses: concave and convex, describing their physical characteristics. The tutorial concludes with an example of a convex lens used in a magnifying glass to enlarge objects.

Which of the following objects commonly uses lenses?

• Hats

• Shoes

• Eyeglasses

• Books

What is the primary function of a lens?

• To emit light

• To reflect light

• To bend light

• To absorb light

What materials are most lenses made from?

• Glass and plastic

• Paper and cardboard

• Rubber and fabric

• Metal and wood

How do concave lenses differ in shape compared to convex lenses?

• Concave lenses are thicker in the middle

• Concave lenses are thinner in the middle

• Concave lenses are the same thickness throughout

• Concave lenses are thicker at the edges

What type of lens is used in a magnifying glass?

• Concave lens

• Convex lens

• Flat lens

• Cylindrical lens