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13 Cards in this Set
- Front
- Back
When was the first telescope invented |
At the end of the 16th century
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How do you find the focal length of a converging lens
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By focusing a distant object onto a piece of paper and measuring the distance between the lens and the paper
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What is the focal point
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The point where all the rays of light meet |
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How does a refracting telescope work
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How does a reflecting telescope work
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2 facts about electromagnetic waves
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They are transverse
They do not need a medium to travel |
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Are sound waves longitudinal or transverse
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Longitudinal
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What is the wave speed equation
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Wave speed (m/s) =distance (m)
Time (s) |
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When was the first reflecting telescope made and by who
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By sir Isaac Newton in 1668
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what is the second wavespeed equation |
wavespeed(m/s) = frequency x wavelength |
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Who discovered infrared radiation and how? |
William Herschel split a light ray into a spectrum using a prism and put a thermometer at each end of the spectrum . As the colour changed from violet to red the temperature rose |
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When was the first reflecting telescope made and by who
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By sir Isaac Newton in 1668
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When was the first reflecting telescope made and by who
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By sir Isaac Newton in 1668
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