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Junior Cert Science

Light is a form of _____ Energy
What do you call the instrument whose vanes move when light shine on them Crookes radiometer
What do you call an object that gives out light Luminous object
What do you call an object that does not give out light Non-luminous object
How does light travel Straight lines
To demonstrate that light travels in straight lines you would need what apparatus Cardboard sheets with hole and a light
What is created if an object blocks light Shadow
What do you call the part of a shadow where light is blocked completely Total shadow
What do you call the part of a shadow where some light is getting through Partial shadow
Light bouncing back of an object is called what Reflection
In reflection the angle that light rays hit an onbject is of entry is _______ to the exit angle Equal
What do you call an object that can emit a narrow beam of light Raybox
What do you call an object that can be used to see over a wall Periscope
How many mirrors are in a periscope Two
What angle are the mirrors in a periscope positioned 45 degrees
What do you call the bending of light from one medium to another Refraction
In refraction why does the object appear bent Different mediums have different density
Give another name for a concave lens Converging lens
Give another name for a convex lens Diverging lens
What type of lens will bring light rays together Convex lens
What type of lens spreads light rays out Concave lens
How many colours make up white light Seven
What do you call the breaking up of white light into its colours Dispersion
What do you call the triangular glass block used to break up white light Prism
What term is given to the band of seven colours Spectrum
What colour is missing, red, orange, green, blue, indigo, violet Yellow
Created by: gcu science
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