Measuring reflected light: plan | Science | Quizalize & Oak National Academy

Starter quiz

What is darkness?

very low light

dark light

the absence of light ✓
What is the name of the equipment shown in the image?

mirrorscope

spyscope

periscope ✓

mircroscope
What do periscopes help us to do?

see objects which are too far away to see with just our eyes

see objects which are high up or round corners ✓

see objects which are too dark

see objects which are too small to see with just our eyes
In the eye, what is the pupil?

the coloured part of the eye

an opening in the eye that allows light to enter ✓

the protective surface over the front of the eye
How are mirrors useful to us?

They can change the speed of light.

They can change the colour of light.

They can change the direction of light. ✓
Match the method of recording to the description.

A scientific model is ...

⇔

a physical or computer representation of a scientific idea or fact. ✓

A scientific diagram is ...

⇔

a drawn or printed representation of a scientific idea or fact. ✓

A scientific theory is ...

⇔

an explanation for why things work or how things happen. ✓

Exit quiz

When light is ______ off the surface of an object, it changes direction.

'reflected' ✓
An ______ is the space between two straight lines which join at a vertex or point.

'angle' ✓
What piece of equipment is used to measure the size of angles?

light meter

compass

force meter

protractor ✓
Match the unit to the measurement they are used for.

metres

⇔

length ✓

lux

⇔

light intensity (brightness) ✓

degrees

⇔

angle ✓

minutes

⇔

time ✓
What is the size of the angle in this diagram?

35

40 ✓

140

45
What is the normal line?

a dark line of light at a right angle to a surface from which light is reflected

an imaginary line on a protractor that is used to measure angles

an imaginary line at a right angle to a surface from which light is reflected ✓

the line on a protractor that is used to measure angles

Worksheet

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Presentation

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Video

Lesson Details

Key learning points

An angle is the space between two straight lines which join at a vertex or point.
A protractor is a piece of equipment used to measure and draw angles.
When we measure the angle of light hitting a surface, we measure the angle between that light and the normal line.
The normal line is an imaginary line that is at a right angle to the surface.

Common misconception

To measure the angle where light hits a surface, measure in between the beam of light and the surface.

The lesson gives children an opportunity to explore a new concept: the normal line. They should become familiar with measuring between the beam of light and the normal line drawn at a right angle to the surface.

Keywords

Reflected - If light is reflected it is bounced off a surface.
Angle - An angle is the space between two straight lines which join at a vertex or point.
Protractor - A protractor is a piece of equipment used to measure and draw angles.
Patterns - Scientists look for patterns in data to answer their questions.
Normal line - The normal line is an imaginary line that is at a right angle to a surface on which light is reflected.