Lens and Light Homework Help: Principal Focus, Rays, Refraction

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IGCSE lens homework clues

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Lens and Light Homework Help

Light at focal point = principal focus

Draw three rays coming from the principal focus towards the converging
lens:
F

This needs to be drawn out to scale in order to get
the right answer!

a. Object and image

b.

c.

d.

Follow the
instructions in the
question and
draw/label:
* Normal
* iº
* rº
Etc…….

Air

Water 60º
30º

$• because…. Does a ray get refracted if it comes in along the normal? Which diagram shows refraction happening when it should happen?$

Extension question!

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Lens and Light Homework Help: Principal Focus, Rays, Refraction

1. Lens and Light Homework Help Light at focal point = principal focus Draw three rays coming from the principal focus towards the converging lens: F

2.

3. This needs to be drawn out to scale in order to get the right answer!

4.

5. a. Object and image b. c. d.

6.

7. Follow the instructions in the question and draw/label: * Normal * iº * rº Etc…….

8.

9. Air Water 60º 30º

10. • because…. Does a ray get refracted if it comes in along the normal? Which diagram shows refraction happening when it should happen?

11.

12.

13. Extension question!