Lenses Flashcards by Hannah Phillips | Brainscape

Q

What type of lens is used for a magnifying glass?

A

Convex

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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

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Q

What 2 factors affect the focal length?

A

> refractive index of the material

> the curvature of the two surfaces of the lens

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