5318943
Description
Flashcards by Princess Terin, updated more than 1 year ago
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Created by Princess Terin
over 9 years ago
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| Question | Answer |
| Which model places the Sun at the centre of the solar system? | Heliocentric |
| Who proposed the heliocentric model? | Copernicus |
| What did Galileo discover and what theory did it support? | Jupiter's moons, Heliocentric model |
| What two types of waves do non luminous objects emit? | Microwaves and radio waves |
| What invention allowed the discovery of Uranus, Neptune and Pluto? | Telescope |
| What does the eyepiece of a telescope do? | Magnifies the image |
| What is another name for a converging lens? | Convex |
| Define focal length | The distance between the focus and the lens |
| What happens to waves at boundaries between different materials? | Refracted |
| What two things happen to a wave when it meets a boundary between different materials? | change of speed and direction |
| What can you do to a real image? | Project it on a screen |
| State two factors that affect the magnification of a converging lens. | How curved the surface is and how close together the lenses are |
| What does a reflecting telescope have that a refracting telescope does not? | Mirror |
| How can you change about the primary mirror to make the image brighter? | Make the mirror larger |
| What do waves transfer? | Energy |
| Define frequency. | The number of waves passing a point per second |
| Define wavelength | The distance from one peak to another peak or one trough to another trough. |
| Define amplitude | The maximum distance of a point on a wave from its resting position. |
| What type of wave are electromagnetic waves? | Transverse |
| What type of wave are sound waves? | Longitudinal |
| What type of waves can be both longitudinal and transverse? | Seismic |
| If a wave carries a surfer 52m in 8 seconds, what is the wave speed? Show your working. | 52m divided by 8s equals 6.5m/s |
| If a wave has a wavelength of 13m and has a frequency of 0.5Hz, what is its speed? Show your working. | 13m multiplied by 0.5Hz equals 6.5m/s |
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