Physics 6.3.1

Question 1

What is a ‘Lens’?

Answer 1

A Lens is a Piece of Equipment that Forms an Image by Refracting Light.

Question 2

What are the 2 Types of Lens? (2)

Answer 2

-Convex.

-Concave.

Question 3

What Happens to Light in Convex Lenses?

Answer 3

In a Convex Lens, Parallel Rays of Light are Converged to a Focus. This Point is Called the Principal Focus.

Question 4

In a Convex Lens, Parallel Rays of Light are Brought to a Focus. What is this Point Called?

Answer 4

Principal Focus.

Question 5

What do you Call the Distance from the Lens to the Principal Focus?

Answer 5

Focal Length.

Question 6

What is the ‘Focal Length’?

Answer 6

The Distance from the Lens to the Principal Focus.

Question 7

What does the Focal Length Depend on?

Answer 7

How Curved the Lens is.

Question 8

The More Curved the Lens, the ___ the Focal Length.

Answer 8

Shorter.

Question 9

What happens to Light Rays in Concave Lenses?

Answer 9

Parallel Rays of Light are Made to Diverge (Spread Out) from a Point (Principle Focus).

Question 10

What are Convex Lenses Sometimes Called?

Answer 10

Converging Lens.

Question 11

What are Concave Lenses Sometimes Called?

Answer 11

Diverging Lens.

Question 12

The Principal Focus in Concave Lenses is the Point from which the Light Rays Appear to ___ from.

Answer 12

Diverge.

Question 13

The More Curved the Convex Lens, the ___ the Focal Length.

Answer 13

Shorter.