1. Do Now Stick in Ray and Wave sheet Read pages 144 & 145

2. Learning today
Please remember to remain in you seats unless given permission
Reflection of light
How to draw ray diagrams
Homework – Mirror island please use a pencil and ruler! Due Wednesday 2nd May

3. What is the nature of the image?

4. Size of image is the same as object
Virtual image
Erect image
Laterally inverted
Distance of image from the mirror is same as that of object

5. Angle of incidence = Angle of reflection
Normal
Incident ray
Reflected ray
Angle of incidence
Angle of reflection
Mirror

6. Mirrors reflect light rays.6

7. Plane Mirrors (flat mirrors) How do we see images in mirrors?7

8. Plane Mirrors (flat mirrors)
object
image
How do we see images in mirrors?
Light reflected off the mirror converges to form an image in the eye. 8

9. Plane Mirrors (flat mirrors)
image
object
How do we see images in mirrors?
Light reflected off the mirror converges to form an image in the eye.
The eye perceives light rays as if they came through the mirror.
Imaginary light rays extended behind mirrors are called sight lines. 9

10. Plane Mirrors (flat mirrors)
object
image
How do we see images in mirrors?
Light reflected off the mirror converges to form an image in the eye.
The eye perceives light rays as if they came through the mirror.
Imaginary light rays extended behind mirrors are called sight lines.
The image is virtual since it is formed by imaginary sight lines, not real light rays. 10

11. Let’s try some questions!
Page 145 Question 1 & the exam question

12. Why?
Eye
Object
Mirror

13. Why?

14. Why?

15. Why?

16. Why? i r

17. Why?

18. Why?

19. Why? i r

20. Why?

21. Why?

22. Why?

23. Why?

24. Why?
“virtual” image

25. Let’s try some questions!
Page 145 Question 1 & the exam question

26. What have you learnt?
You have one minute to tell each other what you have learnt this lesson