In the diagram, I can tell that the light is moving into a (more/less) dense medium, due to the fact that it moves (away from/towards) the normal.
Question 3
3.
State the formula for calculating wave speed.
Question 4
4.
Name the main store of energy in a moving object
Question 5
5.
A tennis ball contains 250J of energy stored kinetically. On contact with the ground, 200J is transferred to the elastic store. Calculate the amount of energy lost as heat:
Question 6
6.
Challenge: Calculate the frequency of a wave which is travelling at 12m/s with 1.5m between each crest.
New learning - checking for understanding
Question 7
7.
Question 8
8.
Question 9
9.
Question 10
10.
LCWC - Knowledge checker
Question 11
11.
State the colours in visible light
Question 12
12.
What does a filter do?
Question 13
13.
Why do objects appear to be white?
Question 14
14.
Why do objects appear to be black?
LCWC - No peeking
Question 15
15.
State the colours in visible light
Question 16
16.
What does a filter do?
Question 17
17.
Why do objects appear to be white?
Question 18
18.
Why do objects appear to be black?
Recall quiz
Question 19
19.
Question 20
20.
Question 21
21.
You do task
Question 22
22.
Explain why we see each of the following colours through the filters, in each example.
Plenary
Question 23
23.
A light ray is reflected. The angle of incidence is 45°, what is the angle of reflection?
Question 24
24.
What are the three other things that can happen to light waves when interacting with an object, apart from reflection?
Question 25
25.
What do we call it when light changes speed and direction when moving from one medium to another?
Question 26
26.
Explain why an object appears black?
Which colour light is this object absorbing...
Green
Blue
All of them
All except green
Which colour light is this object reflecting:
Red
Blue
All of them
All except red
Which colour light is this object reflecting:
Red
All of them except blue
All of them
Blue
Which colour light is this object absorbing
All of them except blue
All of them
All of them except green
Blue
A.Why does the shirt look blue?
The top absorbs all of the blue light so it looks blue.
The top has a blue light shining on it so it looks blue.
The top absorbs all the colours except for blue, which it reflects back making it look blue.
Why do the shorts look white?
The shorts reflect all of the colours so they look white.
The shorts absorb all the colours so they look white.
The shorts don’t let any light reflect from them so they look white.
Why do his shoes look black?
The shoes don’t absorb any light so they look black.
The shoes have no light shining on them so they look black.
The shoes absorb all of the colours so no light reflects back and they look black.