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1994-09-04
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@The diagram shows a WHITE ray of light entering a prism. What colour is ray A?
#col1
Red
White
Violet
@A white ray of light enters a prism. The colour of ray B is:
#col1
Violet
Cyan
Red
@How many colours are there in the spectrum?
Seven
Eight
Six
@Which one of the following is NOT a primary colour?
Yellow
Red
Green
@What are complementary colours?
Any two colours which produce white when mixed
Any two colours when mixed produced black
Any two colours when mixed produce red
@Green and Blue light when mixed together produce:
Cyan
Indigo
Magenta
@Red and Blue light mixed together makes:
Magenta
Indigo
Cyan
@What three colours, when mixed together, produce white?
Red, green and blue
Green, yellow and cyan
Red, green and yellow
@Why does an object appear white in white light?
Because it reflects all the colours of the spectrum
Because it only produces white light
Because it absorbs all the colours of the spectrum
@Why does an object appear black in white light?
Because it absorbs all light
Because it reflects all light
Because it only reflects red and blue
@Why does an object appear red in white light?
Because it only reflects red light
Because it produces red light
Because it reflects green and blue light
@What is the name given to the process when a prism splits light into a spectrum?
Dispersion
Destruction
Dispersal
@White light, passing through a prism, emerges as colours of the spectrum. This is because:
the colours of the spectrum are slowed down and 'bent' by different amounts
interference effects cause small amounts of white light to change to different colours
the white light causes the prism to produce colours of the spectrum
@A picture, drawn in red, on a white background is viewed through a red filter. What is seen?
The red picture almost disappears
The picture remains unchanged
The picture stands out because it now appears to be drawn in black
@Which combination of colours is in the correct order for a spectrum?
Orange, yellow, green and blue
Red, yellow, green and violet
Yellow, orange, blue and violet
@What are the three primary colours?
Green, red and blue
Orange, green and red
Red, blue and yellow
@What are the three secondary colours?
Cyan, magenta and yellow
Violet, magenta and green
Viridian, yellow and magenta
@Which one of the following statements is true?
In a vacuum, all colours travel at the same speed
Colours always travel at different speeds
Blue light always travels faster than red light
@White light is shone through a red filter. What colour(s) passes through and is seen?
#col2
Red only
All colours except red
Only darker colours such as red and blue
@White light viewed through a red filter look red. This is because:
#col2
all colours except red are absorbed
the colours are changed to red by the filter
the filter only absorbs red light