Year 7 Science · Unit 3 · Lesson 15

Light Energy — Reflection and Refraction

Foundation Worksheet

Name
Date
Class

Learning Goals

Warm Up

Sort it!

Write each item from the pool into the correct category box. Some items may involve both, but sort by the MAIN process shown.

Your face in a bathroom mirror A straw looks bent in a glass of water A periscope on a submarine Spectacle lenses correcting short-sightedness Light from the Moon at night A pool looks shallower than it is Shimmering heat mirage on the Nullarbor road A rough concrete path scatters light in all directions Optical fibre carrying internet data in Australia A rainbow forming in rain droplets

Reflection

Refraction

Neither

Your Turn

True or False? Fix the false ones

Circle T or F for each statement. If the statement is false, rewrite it correctly on the line below.

Light slows down when it enters glass from air.

Correct it:

T
F

When light travels from air into glass, the refracted ray bends away from the normal.

Correct it:

T
F

In the law of reflection, the angle of incidence equals the angle of reflection, both measured from the normal.

Correct it:

T
F

A rough surface produces specular (mirror-like) reflection because all rays bounce off in the same direction.

Correct it:

T
F

A fish underwater appears to be at a shallower depth than it actually is because of refraction.

Correct it:

T
F

Show What You Know

1. A ray of light hits a mirror with an angle of incidence of 35°. What is the angle of reflection? Explain your reasoning and draw a simple ray diagram in the space provided, labelling the normal, both angles, and the mirror surface.

Recall 3 marks

2. When you look at your reflection in a flat bathroom mirror, the image appears to be the same distance behind the mirror as you are in front. State two other properties of a plane mirror image.

Recall 2 marks

Wrap Up

In one sentence, what was the main idea of this lesson?

HSCScience · Year 7 Science · Unit 3 · Lesson 15 · Foundation Worksheet