Unit 1, lesson 7: converging/diverging lenses

Question 1

What are lenses

Answer 1

They change the appearance of objects, can make them larger, smaller, inverted, etc, made of thin plastic or glass with at least one curved side

Question 2

Do light rays meet on the other side of converging lenses

Answer 2

Yes

Question 3

Do light rays meet on the other side of diverging lenses

Answer 3

No

Question 4

Converging lenses

Answer 4

Two convex mirrors fused together, light can pass through from both diretions = two focal points (per side). THINK OF DIAGRAM RIGHT NOW.

Question 5

Rules for converging lenses, and dose salt change

Answer 5

1. An incident ray traveling parallel to the PA will refract through the focal point behind the lens
2. An incident ray traveling through the focal point will refract parallel to the PA.
3. An incident ray traveling directly through the center of the lens will not bend and go straight through
   SALT will change depending on object location

Question 6

Diverging lenses

Answer 6

Two concaved mirrors fused together, two sides = two focal points. DIAGRAM

Question 7

Rules for converging lenses SALT

Answer 7

1. An incident ray parallel to the PA will refract AS IF it’s coming for the focal point on the same side of the object
2. An incident ray pointed at the focal point on the other side of the lens will refract parallel to the PA.
3. An incident ray pointed at the center of the lens will travel right through without bending
   SALT is always the same
   S: smaller
   A: upright
   L: between object and lens
   T: virtual