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What is the name of the light-sensitive layer of cells at the back of the eye?
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?
To the nearest minute how long does it take for light to travel from the Sun to Earth?
6 | 4 | 2 | 8
Which unit of power was devised by James Watt to describe the power of his steam engines?
What SI unit is used to measure force?
Sievert (Sv) is the international SI unit for measuring what?
Radiation absorption | Heat of Chilli Peppers | Viscosity | Magnetic Flux
What is Uruguay's unit of currency?
A millibar is a unit used to measure what?
Distance | Weight | Temperature | Atmospheric pressure