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What is the S.I. unit for light intensity?
What are the ingredients with E numbers 200-299 used for in foods?
Colors | Sweeteners | Flavours | Preservatives
In yards, what is the length of a cricket pitch?
What is the name for two straight lines that run at exactly the same distance apart?
What is the name of the light-sensitive layer of cells at the back of the eye?
If the length of a rectangle is 15cm and its width is 11cm, what is its perimeter?
What is the name for the bending of light as it passes through a surface?
Which scientist found that light could be split into many colours?
The length and width of what is measured by using a Brannock Device?
What is the average distance from Earth to Mars?
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