Homework 1
Answer the questions below in sentences.
1. Explain what it means if a material is described to be
opaque.
2. Give an example of a translucent material.
3. What is the speed of light in a vacuum?
4. Copy and complete the law of reflection:
the angle of __________ = the angle of ___________
5. What angle would you shine a light ray if you have 60
degrees between the normal line and the reflected ray?
6. When light passes through one material to another (for
example through air then glass), the light would refract.
Explain what is meant by refraction.
Homework 2
In class you investigated how to produce a spectrum of colours
using a white light source and a prism. In everyday life we call
a spectrum a rainbow.
Making Rainbows
Your homework task is to produce a power point, leaflet or
poster explaining how rainbows are produced. Your piece of
work should include the following information:
 Who was the first scientist to investigate how spectrums
were produced?
 How the white light refracts and what it refracts through?
 What colours of light that a rainbow is made of?
Homework 3
In class you found out about the eye and the two main reasons
that people need to wear glasses.
Your homework task is to become an optician for a week.
You have to pick a member of your family or friend that wears
glasses and design away of testing their eyes to discover
whether they are long or short sighted and then figure what
type of lenses their glasses would need.
To complete this homework task you must write up your
findings as you would write up any experiment in class. This
means your homework “write up” should include the following
sub headings:
 Aim
 Apparatus
 Method
 Results
 Evaluation
Homework 4
Answer the questions below in sentences.
1. What is the Electromagnetic Spectrum?
2. Write down all the members of the Electromagnetic
Spectrum in order of shortest to longest wavelength.
3. What do infrared rays have to do with your television
remote control?
4. Why are ultraviolet rays harmful to us?
5. Explain how x-rays are used to detect broken bones.
6. Give a practical use for each of the following members of
the Electromagnetic Spectrum:
(a)
(b)
(c)
radiowaves
microwaves
gamma rays
Homework 5
In your science lessons, you have been finding out about
invisible radiation. In this homework you will be researching
how radiowaves are detected and sent by satellites.
Most of you use satellite dishes when watching TV, but
how many of you know why they are necessary? Research the
physics behind satellites and present your information in the
form of an advert. This could be an advert for a newspaper,
radio station or TV show.
Your advert should include:
 How satellites work?
 How satellites help to solve the problem that signals can
only travel in straight lines?
 Why they are curved in shape instead of flat?