# Physics topic 1 & 2

Flashcards by , created about 6 years ago

## GCSE Physics Flashcards on Physics topic 1 & 2, created by taylor2em on 05/30/2013.

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 Created by taylor2em about 6 years ago
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 Question Answer What is a boundary? A place where TWO things meet What is the incident ray? The light ray that arrives at the boundary? What angle is the angle of incident the same as? The angle of reflection What does refraction mean? Change direction What is a converging lens? Where parallel rays of light converge/move closer :) ooooh la la What does the focal point mean? The point where all the rays meet :D :D What does the objective lens do? It converges to form a real image What does the eye piece lens do? So the image can be seen, and it also magnifies the image What kind of telescope uses a concave mirror? Reflecting telescope? (Remember that a mirror is a REFLECTION of you) see what I did there ;) How did Ritter discover ultraviolet radiation? He exposed strips of silver chloride coated paper to each colour in the visible light spectrum using a prism, and times how long it took to turn black The strips changed quickest when exposed to light nearer the blue end of the spectrum He saw the quickest change was just past the violet part of the spectrum What are microwaves used for? Cooking, satellite communication, mobile phones :))) THANKYOOOUUU MICROWAVESSS!!! What are the dangers of UV radiation Causes skin cancer and eye damage What is infrared used for? Thermal imaging, optical fibres transmitting data, cooking, grills, toasters, computers, remote controls What are the THREE types of ionising radiation? Alpha, Beta, Gamma What does ionising radiation cause atoms to do? Lose electrons