Across
- 4. Space in which there is no matter or in which the pressure is so low that any particles in the space do not affect any processes being carried on there.
- 5. an optical phenomenon that creates the illusion of water and results from the refraction of light through a non-uniform medium
- 11. the one who proposed the laws of planetary model
- 12. transparent optical element with flat, polished surfaces that refract light
- 13. is the point in the orbit of a celestial body where it is nearest to its orbital focus
- 20. is the bending of a wave when it enters a medium where its speed is different
- 21. an optical instrument designed to make distant objects appear nearer,
- 25. which is the point in the orbit where the celestial body is farthest from its focus
- 26. He changed the way of thinking, not only astronomically but also religiously.by saying the universe is sun-centered.
- 28. color that has the lowest frequency and the longest wavelength
- 29. the property or tendency of a moving object to continue moving.
- 30. the change in position of an object
- 33. the branch of mechanics concerned with the motion of objects without reference to the forces that cause the motion
- 34. the speed of an object in a particular direction
- 37. a space between objects, units, points, or states
- 38. the natural agent that stimulates sight and makes things visible.
- 41. the rate at which velocity changes over time
- 42. made important contributions by devising the most precise instruments available before the invention of the telescope for observing the heavens
- 43. An acronym for the colours of the visible light spectrum
- 44. the fundamental particle of light. They have a unique property in that they are both a particle and a wave.
- 45. is the branch of physics which involves the behaviour and properties of light.
- 47. He is sometimes called the grandfather of science. He studied under the great philosopher Plato
Down
- 1. the branch of science concerned with the nature and properties of matter and energy
- 2. invent/devised a telescope that could enlarge objects up to 20 times
- 3. an object, whether natural (such as the moon),that revolves around a central body.
- 6. distance divided by time
- 7. the gravitationally curved path of an object around a point in space
- 8. the apparent daily motion of stars around the Earth
- 9. Earth-centered model of the universe
- 10. the combination of two or more electromagnetic waveforms to form a resultant wave in which the displacement is either reinforced or canceled.
- 14. an object's change in position relative to a reference point
- 15. is a point on the wave where the displacement of the medium is at a maximum
- 16. the branch of science that deals with celestial objects, space, and the physical universe as a whole.
- 17. sus-centered model of the universe
- 18. the act of reflecting, as in casting back a light or heat, mirroring, or giving back or showing an image
- 19. the separation of white light into colors, or the separation of any radiation according to wavelength.
- 22. F=ma is the formula of
- 23. the distance over which the wave's shape repeats
- 24. a force that attracts any objects with mass.
- 27. a force that opposes motion between two surfaces that are in contact
- 31. is the slight bending of light as it passes around the edge of an object.
- 32. the distance traveled divided by the time interval during which the motion occurred
- 35. proposed the three law of motion
- 36. an arch of colors formed in the sky in certain circumstances, caused by the refraction and dispersion of the sun's light by rain or other water droplets in the atmosphere
- 37. An object at rest will remain at rest unless acted on by an unbalanced force
- 39. a colour or shade
- 40. the transport of energy without the transport of matter
- 46. biggest star