Light and water

Light and water

Pencil and paper
Overview
Connecting to the Curriculum
Marking Student Responses
Diagram 1
a) This diagram shows what happens when light rays enter a droplet of water. Circle either A, B, C or D in the table to show what is happening at positions X, Y, and Z.
 

  Position X Position Y Position Z
(A) Dispersion Refraction Reflection
(B) Dispersion and refraction Reflection Refraction
(C) Dispersion Reflection Reflection
(D) Dispersion and reflection Reflection Refraction

 
Diagram 2
b) Diagram 2 shows a situation where a rainbow might be formed.
  i)
Drawing on this diagram, complete the line labelled light ray to show how the direction of the light ray is altered by the band of rain.
 
  ii) Which letter shows the position a person would need to be to see this rainbow?
   
(A)  Position P
(B)  Position Q
(C)  Position R
(D)  The rainbow could be seen from P, Q and R
 
c) Light rays are refracted when they
  (A)
(B)
(C)
(D)
 cross with other light rays.
 bounce off solid, dark coloured objects.
 travel from one transparent material to another.
 travel through sound waves.
Level:
5
Description of task: 
Task: Select the correct words to decribe what is happening to light as it travels through a drop of water. Assessment focus: scientific vocabulary.
Curriculum Links: 
Science capabilities
The capabilities focus is brought about by the conversations you have and the questions you ask.
 
Capability: Interpret representations
This resource provides opportunities to discuss
  • the conventions of diagrams and how they clarify the meaning for the reader.
  • the role that science knowledge plays in being able to interpret a diagram.
Answers/responses: 
 

Y10 (6/98)

a) B difficult
b) i) Drawing of a ray reflected from the rainbow back to position P.
ii) A
difficult
difficult
c) C moderate