Chapter 8- Light And Optics Flashcards Preview

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Flashcards in Chapter 8- Light And Optics Deck (30)
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1

Visible light spectrum

400nm to 700nm

2

Electromagnetic waves

Transverse waves oscillating with electric and magnetic fields that are perpendicular to each other

3

Rectilinear propagation

When light travels through homogeneous mixture it travels in a straight line

4

Reflection

Rebounding of incident light waves at the boundary of a medium (bounce off)

5

Type of image for plane mirrors

Always virtual because light is in front but image looks like it's behind the mirror

6

Convex mirror

Everything appears smaller and further away. Diverging.

7

Concave mirror

Everything appears bigger and closer. Converging.

8

Focal point for spherical mirrors

f = r/2

9

Mirror equation

1/f = 1/o + 1/i = 2/r

10

Image distance

Positive distance = real (in front of mirror)
Negative distance = virtual (behind mirror)

11

Magnification

-i/o

12

Refraction

Bending of light as it passes from one medium to another and changes speed

13

Speed of light in any medium besides a vacuum

It's always less.

14

Index of refraction

n = c/v
n- index of refraction of the medium
Always larger than 1 for anything besides air.

15

Critical angle

sin -1 (n2/n1)

16

Total internal reflection

A phenomena in which all the light incident on a boundary is reflected back into the original material. When angle of incidence is greater than the critical angle

17

Lensmaker equation

1/f = (n-1) (1/r1 - 1/r2)

18

Positive focal length and radii of curvature for mirror and lens

Converging

19

Diverging lens or diverging mirror

Negative focal length and radii of curvature

20

Power of lens

P = 1/f
f- focal length in meters

21

Nearsighted vs farsighted lenses

Near- diverging lens
Far- converging lens

22

Hyperopia

Farsightedness

23

Myopia

Nearsightedness

24

Spherical aberration

Blurring of periphery of an image as a result of inadequate reflection of parallel beams at the edge of a mirror or inadequate refraction of parallel beams at the edge of a lens.

25

Location of dark fringes for single slit diffraction

a sin() = n(wavelength)

a- width of a slit

26

Positions of dark fringes with two slits

d sin() = (n + 1/2)(wavelength)

d- distance between two slits

27

Speed of light equation

c = f(wavelength)

28

For single mirrors or lenses

All real images are inverted

29

As light rays travel from one medium to another what changes

Wavelength only

30

If a ray of light is traveling from one medium to another where it's going from a low index of refraction to a higher one then what happens to the angle?

It gets smaller