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

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

What is the nature of the image?

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

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

Mirrors reflect light rays. 6

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

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

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

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

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

Why? Eye Object Mirror

Why?

Why?

Why?

Why? i r

Why?

Why?

Why? i r

Why?

Why?

Why?

Why?

Why? “virtual” image

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

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