SNC2P1/PL – Optics HomeworkE. Wong Updated Sep 2016

NAME: ______Date: ______

Worksheet 1 What is Light? (Nelson p.426-429)

  1. Use the vocabulary below to fill in the blanks. You may use each term more than once. You will not need to use every term.

electromagnetic spectrumenergylongerlower

visible lightvacuummediumwave

visible spectrumsolar radiation wavelength

a)Light is a form of ______.

b)Light travels like a ______.

c)Energy from the Sun is also called ______.

d)The distance between two peaks of a wave is called ______.

e)Electromagnetic waves can travel through ______.and through a ______.

f)An______shows the electromagnetic waves in order of wavelength and energy.

g)Radio waves have a ______energy and a ______wavelength than visible light does.

h)The waves of ______are the only waves of the electromagnetic spectrum that human eye can see.

i)______is the continuous sequence of colours that together form visible white light.

  1. How does light energy move from one place to another?

______

  1. Visible light is composed of how many different colours? What are they?

______

______

  1. How could you demonstrate that visible light is composed of many different colours?

______

______

  1. Writethese electromagnetic spectrum in order from lowestenergyto highest energy:

Infrared rays, radio waves, X-rays, visible light, gamma rays, ultraviolet rays, microwaves

______

______

  1. List some devices that you have used or plan to use today that involve electromagnetic waves. State the type of electromagnetic wave that is used in each device.

______

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  1. True (T) or False (F)?

Statement / T or F
  1. Electromagnetic waves are made up of electrical energy only.

  1. A wavelength is the distance between twopeaks on a wave.

  1. Electromagnetic waves are visible.

  1. The difference between many types of electromagnetic waves is their wavelength and energy.

  1. The longest wavelengths of the visible light are red.

  1. The shortest wavelengths of the visible light are yellow.

  1. The longest wavelengths of the electromagnetic spectrum are radio waves.

  1. Microwaves have higher energy than X-rays.

  1. Yellow light has lower energy than indigo light.

  1. The only waves of the electromagnetic spectrum that you can see are those of visible light.

  1. We can see ultraviolet waves.

  1. Waves carry energy.

  1. white light is made of six colours.

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