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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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.