1. Reflection – Lesson aims
To investigate the angle of incidence and angle of reflection, and find the pattern
To find out the rules about where the image is formed

2. Reflection Practical 1 Set up your ray box and mirror
Shine a ray at the mirror
Mark the ray on your piece of paper
Mark the reflected ray, and the normal
Measure the angles
Try again with different angles
Draw pic in book, state the pattern you find i r
i is angle of incidence
r is angle of reflection

3. Reflection Practical 2
You need to set up the mirror with an object in front of it
Now place another object behind the mirror where the image appears to be
Draw the positions of the mirror, object and image in your book
Can you find a pattern?
image
mirror
object

4. Reflection Notes
The angle of incidence is equal to the angle of reflection (you need to be able to draw this with new situations!)
The image is as far behind the mirror as the object is in front
A line joining the object and the image goes through the mirror at 900
The image in a mirror is upright, laterally inverted (swapped left to right) and virtual (not on a screen)

5. Pinhole Camera Copy this diagram into your books ready for next lesson
tinfoil
Greaseproof paper
Tin can
One small hole in the foil
Point the foil end at a Bunsen or candle

6. Pinhole camera ray diagram
Copy this diagram ACCURATELY
The image is inverted (upside down), and real (on a screen)

7. Pinhole camera extension
Try two holes in the foil – what happens?
Try on large hole in the foil – what happens?
In both cases, write down what you see, and especially how this is different to the first experiment with only one small hole

8. Pepper’s Ghost