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Flashcards

Science Unit C Light & Optical Systems Part 2

Raymond Madrid Science Grade 8 English 50 cards

Cards in this deck (50)

  1. 1Wavelength meaning?The distance between adjacent crests measured in nanometers.
  2. 2What is the lowest radiation that a object produces?Radio
  3. 3What is deadly for us that can melt us and cancer?Gamma ray
  4. 4What ray makes us get Cancer?Ultraviolet
  5. 5What is the longest wavelength colour?Red
  6. 6What was the shortest wavelength colour?Violet with 400 nm
  7. 7What is the primary colours to make any colour?RGB (red, green, and blue)
  8. 8What are the secondary colours?CYAN, MAGENTA, YELLOW
  9. 9What is the sclera?The white part of the eye, protects the eyeball.
  10. 10What is the cornea?A clear window in front of the eye which covers the iris and the pupil.
  11. 11What is the iris?The coloured part of the eye which surrounds the pupil. The iris controls how much light can enter the eye by changing the size of the pupil.
  12. 12What is the pupil?A black dot in the centre of the eye, its a opening through which light can enter the eye.
  13. 13What does Lens do in the lens?It is behind the pupil and it acts like a camera lens by focusing light onto the retina at the back of the eye.
  14. 14What is the light-sensitive inner lining at the back of the eye. It is the processing unit where it has rods and cones which can detect light and turn them to electrical impulses that flow to the brain. WHAT IS THIS PART OF THE EYE CALLED?Retina
  15. 15What is in animal's eyes that when you shine a light, their eyes look like they are going to light up?Tapetum lucidum
  16. 16What is in the inside of the eye which is fluid that makes the eyeball to be round?Vitreous Humour
  17. 17When it is bright outside, what would your eyeball do to lower the brightness?The iris will constrict, and it will make the amount of light to enter smaller, which will reduces the light.
  18. 18What does the retina have to detect light and colour?the rods and cones
  19. 19Which can detect light sensitivity? rods or conesrods
  20. 20Which can detect colour? rods or conescones
  21. 21True or false Your eyes (cones and rods) might get overwhelm and they will become fatigued with your brain temporarily perceives the opposite colour.true
  22. 22What is the meaning of a blindspot?An area where the optical nerve meets the eyeball, which means that there is no rods or cones to detect light and colour.
    ur brain fills in the blindspot with surrounding colours
  23. 23What is colour blindness?When someone is unable to distinguish certain colours due to the lack of or damaged cones.
  24. 24true or false your eyes see everything right side up.FALSE, ur eyes see everything upside down, but our brain flips the image right side up
  25. 25What is Nearsightedness (myopia)Someone who can see objects near to the eye, but not far from the eye. The focal point is in front of the retina.
  26. 26how to correct nearsigtedness?Use concave lenses
  27. 27What is farsightedness (hyperopia)?See objects far from the eye, but not near to the eye. the focal point is behind retina.
  28. 28How to correct farsightedness (hyperopia)Use convex lenses
  29. 29What surgery is it called to fix and reshape the cornea to help focus light on the retina?LASER EYE SURGERY
  30. 30What are non-compound eyes?Consists of a round cornea, an iris, a circular lens, vitreous body/cavity, and photoreceptor cells. It is also known as 'camera eyes'.
  31. 31What are compound eyes?Eyes that insects and crustaceans have compound eyes which is made out of many individual units or screens called ommatidium.
    they see many small images put together
  32. 32what is optical device?any device that uses light
  33. 33What are microscope?A optical device that is used for viewing super small objects.
    it was at least two lenses
  34. 34What are telescopes?A optical device for magnifying distant object.
  35. 35What are the two kinds of telescopes?Refracting and reflecting telescope
  36. 36What was the first camera?Camera obscura
  37. 37What was camera obscura?A dark room with a small hole or lens at one side through which an image is projected on the wall opposite the hole.
  38. 38What was the Daguerreotype? 1839The film was slow to react to light. Subjects had to stand still for many minutes.
  39. 39what is the Kodak camera 1888A big box camera that had fast film but subjects still had to stand still for minutes.
  40. 40What is the Leica 1? 1925The first compact camera! The film is now used in cartridges or rolls.
  41. 41What is the Fujj DSX? 1989The first digital camera dubbed DSLR for digital single lens reflex camera. It used electricity and chip rather than film to use to record images.
  42. 42What is the Sharp JSH04? 2000The first digital camera which is small enough to fit in a phone. THE IPHONE WAS RELEASED 7 YEARS LATER IN 2027.
  43. 43How does light enter? (eye vs camera)Pupil, Aperture
  44. 44What controls the amount of light? (eye vs camera)Iris, Diaphragm
  45. 45What interprets the image? \ (eye vs camera)Retina, Film
  46. 46How is the light focused? (eye vs camera)lens and lens
  47. 47What stops light from entering? (eye vs camera)Eyelid, Shutter
  48. 48Pixel meaning?A small square in an image with an assigned colour. Many pixels combine to form larger images. Pixels are used for screens, where as the term ‘dots’ is used for round pigments on paper to form prints.
  49. 49Resolution meaning?The number of pixels/dots that comprise a photo or a screen.
  50. 50U reached the end of Raymond's flashcards.THX for viewing and studying my flashcards and see ya
    -Raymond M 8C

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Grade 8 Science Flashcards on Science Unit C Light & Optical Systems Part 2, created by Raymond Madrid on 25/02/2025.
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Raymond Madrid
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