Light Flashcards Preview

Year 7-8 Advance Science > Light > Flashcards

Flashcards in Light Deck (28):
1

Transparent

Easy to see through, clear image

2

Translucent

Fuzzy image, hard to see since some light reflects and some goes through

3

Opaque

Can't see through at all

4

Transverse waves

Waves that move up and down

5

Equilibrium

The line in the middle

6

Frequency

How many waves that passes though in a second

7

Refraction

The bending of light as it enters another medium with a different density

8

Longitudinal wave

Wave that moves in the same direction

9

Law of reflection

Angle of incidence is equal to the angle of reflection

10

When can total internal reflection happen

Total internal reflection occurs when light travels though a medium that has a low reflective index

11

Is the angle of incidence always greater than the critical angle?

Yes

12

How can the angle of refraction be 90°

When the angle of incidence is equal to the critical angle

13

The higher the frequency

The lower the wavelength

14

The lower the frequency

The higher the wavelength

15

Primary colours

Red, Green and Blue

16

Secondary colours

Magenta, Cyan, Yellow

17

Red + Blue

Magenta

18

Blue + Green

Cyan

19

Red + Green

Yellow

20

Colour spectrum

Arranges colours in order of wavelength

21

How many degrees is the normal

It is 90°

22

Density

The amount of molecules in an area

23

Refracted ray

The ray which has been bent due to the density of the media

24

Velocity

The speed of something in a given direction

25

ROYGBIV

Red, Orange, Yellow, Green, Blue, Indigo, Violet

26

Red

Lowest frequency, longest wavelength and least refracted

27

Violet

Highest frequency, shortest wavelength and most refracted

28

Iris

The iris is the coloured circle surrounding the pupil. It changes the size of the pupil and allows different amounts of light to enter the eye