Chapter 23

Question 1

What are converging and diverging lenses?

Answer 1

Converging- thicker at centre than outsides, bend light toward principle axis
Diverging- thinner at centre than at the outsides, bend light away from the principal axis

Slide 13-16 Feb 14

Question 2

Study ray diagrams
Slide 18-20, 22, 27 Feb 14
Memorize the signs on slide 24 and 25!!!

Answer 2

Okay

Question 3

How are two lenses in combination used?

How is the overall magnification calculated?

Answer 3

The location of the final image is determined by working through steps
The object for lens 2 is the image from lens 1
The object for Lens 3 is the image from lens 2
Etc

Mtot= M1 x M2 x … etc

Feb 26 Slide 10

Question 4

How is a virtual object formed?

What is the sign of p for a virtual object?

Answer 4

This occurs if the image formed by the first lens would have formed past the next lens
p is negative for a virtual object