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Flashcards in Lenses Deck (3)
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1
Q

What type of lens is used for a magnifying glass?

A

Convex

2
Q

How do you know when an image is virtual?

A

> it is on the same side as object

> it is formed by imaginary light rays

3
Q

What 2 factors affect the focal length?

A

> refractive index of the material

> the curvature of the two surfaces of the lens