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Light.Sound

Junior Cert Science

QuestionAnswer
Light is a form of? Energy
The breaking up of white light into its seven colours? Dispersion
Use to split up white light by passing it through it? Glass prism
The band of coloured light produced by dispersion is known as? Spectrum of white light
Which is faster light or sound? Light
When an object blocks the pathway of light a .................... is formed? Shadow
Bending of light as it passes from one medium into another? Refraction
Allows you to see yourself in a mirror? Reflection
The ray that hits the mirror is known as? Incident ray
The ray that comes back off the mirror is known as the? Reflected ray
This type of lens converges light at a point? Convex lens
This type of lens diverges light as it passes through it? Concave lens
Piece of equipment used to show light is a form of energy? Crookes radiometer
Speed of sound in air? 330m/s
Sound needs a ......................... to travel through? Medium
Sound is caused by? Vibrations
Sound travels as a? Wave
A reflected sound is known as an? Echo
Sound above this number can damage your hearing? 70
Sound is measured in? Decibels
Created by: scienceatkcc
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