Optics Flashcards by Megan Blomer | Brainscape

Q

Red

A

650-750

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Q

Orange

A

592-650

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Q

Yellow

A

560-592

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Q

Green

A

500-560

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Q

Blue

A

446-500

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Q

Violet

A

400-446

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Q

Conventions for light rays

A

Travel from left to right
Travel away from the source
Can be acted upon by mirrors, lenses and prisms

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Q

Index of refraction
Glass

A

1.523

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Q

Air

A

1.00

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Q

Cornea

A

1.376

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Q

CR39

A

1.50

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Q

Polycarbonate

A

1.586

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Q

Trivex

A

1.53

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Q

Crown glass

A

1.53

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Q

Converging lenses

A

Plus lenses
Convex lens (base to base)

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Q

Diverging lenses

A

Minus lens
Concave lens (apex to apex?

Q

Minus space

A

In front of lens

Q

Plus space

A

Behind the lens

Q

Real imagie

A

Plus/convex

Q

Virtual image

A

Minus/concave

Q

Focal length formula

A

D=1/f

Q

Surface power formula

A

F1=n’-n/r

Q

Nominal power formula

A

Ft=f1+f2

Q

Spherocylinder approximation

A

F0= FcylSin^2°+Fsph

Q

Prentices formula

A

P=cD
P=cF

Q

Sagittal depth formula

A

Sag=r squareroot r2-(d/2)^2

Q

Approximate sag formula

A

Sag= (d/2)^2D/2000(n-1)

Q

Vergence power of lens

A

U+P = V

Q

Distance of the object from the lens

A

U=1/u

Q

Distance of the image from the lens

A

V=1/v

Q

T/F
Light travels slowest in crown glass

A

True