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Light.Sound
Junior Cert Science
Question | Answer |
---|---|
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 |