Physics 0.0 / 5 ? PhysicsLight and OpticsGCSEAQA Created by: OllyCullisCreated on: 06-05-18 09:27 A non-spherical eyeball is called what? Astigmatism 1 of 23 What type of lens helps someone who is short sighted? Convex Lens 2 of 23 What is the distance from the centre of the lens to the principal focus called? The focal length 3 of 23 When the image is formed where the light appears to come from the image is called...? Virtual 4 of 23 Convex lens refract the light to...? Converge on a point 5 of 23 What makes a lens flatter and thinner? Higher refractive index 6 of 23 For an image to be real and inverted on a converging lens where does the object have to be? Further away from the lens than the principal focus. 7 of 23 If images are formed behind the eyeball then the person is...? Long Sighted 8 of 23 What is the unit for a power of the lens? Dioptres 9 of 23 What requires more energy: Helium Fusion? Or Hydrogen Fusion? Helium Fusion 10 of 23 How long is a solar day? 24 Hours 11 of 23 Roughly how long does it take for the Moon to orbit the Earth? 28 Days 12 of 23 How long is a side real day? 23 Hours 56 Minutes 13 of 23 6. What unit of measurement is used when measuring how far away distant galaxies are? Megaparsecs 14 of 23 What does parallax enable astronomers to do? Measure the distance of visible stars 15 of 23 What two factors affect the luminosity of a star? Size and Temperature 16 of 23 In a simple telescope which is more powerful? Eyepiece? or Objective? Eyepiece 17 of 23 What do spectrums of the light produced by stars show? The elements in the star. 18 of 23 What part of star emits EM radiation into space? Photosphere 19 of 23 Name the person correct about the number of galaxies in Our Universe? Curtis 20 of 23 What is the order of least to most ionising radiation? Gamma, Beta, Alpha 21 of 23 How many neutrons does an alpha particle have? 2 22 of 23 What is the order of most to least ionising radiation? Alpha, Beta, Gamma 23 of 23
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