Optics

Front 1

Hue

Back 1

The colour of light relating to it's wavelength

Front 2

Luminousity

Back 2

The perceived 'brightness' of a colour relating to the intensity of it's retinal stimulus

Front 3

Saturation

Back 3

Variation in depth of hue by mixing/diluting with white light

Front 4

Limits of the visible spectrum

Back 4

760nm to 390nm

Front 5

Red in light spectrum

Back 5

760-622

Front 6

Green in light spectrum

Back 6

577-492

Front 7

Blue in light spectrum

Back 7

492-455

Front 8

Mirrors - centre of curvature

Back 8

The centre of a sphere from which a mirror has been cut.

Front 9

Mirrors - principal focus

Back 9

The axial point where paraxial rays intersect or appear to intersect.

Front 10

Mirrors - pole/vertex

Back 10

The point at which the surface of the mirror intersects with the principal axis.

Front 11

Mirrors - principal axis

Back 11

The line joining the pole/vertex, principal focus and centre of curvature.

Front 12

Mirrors - radius of curvature

Back 12

The distance measured from the mirrors surface to the centre of curvature.

Front 13

Mirrors - focal length

Back 13

Measured from the mirror surface to the principal focus and is always 1/2 of the radius of curvature.

Front 14

Velocity

Back 14

Speed of travel in a given direction.

Front 15

Wavelength

Back 15

The distance between corresponding points on successive waves.

Front 16

Frequency

Back 16

The number of complete waves generated per second.

Front 17

Amplitude

Back 17

Maximum value of the wave.

Front 18

The normal

Back 18

A virtual line drawn perpendicular to the surface at the point of incidence.

Front 19

Incident ray

Back 19

The ray of light which strikes the reflecting/ refracting surface.

Front 20

Reflected ray

Back 20

The ray of light leaving the surface after being reflected.

Front 21

Angle of incidence

Back 21

The angle measured from the normal to the incident ray.

Front 22

Angle of reflection

Back 22

The angle measured from the normal to the reflected ray.

Front 23

Angle of deviation

Back 23

The angle between the original ray path at the surface and the ray leaving the surface.

Front 24

Laws of reflection

Back 24

1. The incident ray and the reflected ray lie in one plane which is perpendicular to the surface at the point of incidence.

2. The angle of reflection is equal to the angle of incidence.

Front 25

Deviation formula mirrors

Back 25

d = 180 - 2i

Front 26

Nature of light formula

Back 26

Velocity = frequency x wavelength

Front 27

Angle of refraction

Back 27

The angle measured from the normal to the refracted ray.

Front 28

Laws of refraction

Back 28

1. The ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant equal to the refractive index. Sin I ÷ sin i' = n

2. The incident ray and the refracted ray all lie in one plane which is perpendicular to the surface at the point of incidence.

n sin I = n' sin i'

i' = sin -1 (n sin I ÷ n')

Front 29

Horizontal displacement in a parallel sided glass block

Back 29

h = (t × tan i1) - (t x tan i1')

Front 30

Lateral displacement in a parallel sided glass block

Back 30

S = t sin ( i1' - i1') ÷ cos i1'

Front 31

Critical angle formula

Back 31

ic = sin -1 (n'÷n)