YR2_T1_LSN6

YR2_T1_LSN6
Topic 1.4
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YR2_T1_LSN6
Topic 1.4

Slide 1 - Diapositive

Topic 1.4 - Learning Goals:
I can…

  • Explain what the different parts of the electromagnetic spectrum are and where the different types of waves are found
  • Label the different parts of the human eye and know the function of each part
  • Understand the purpose of the rods and cones in the human eye
  • Explain how the eyes lens bends to focus light, allowing us to see
  • Explain what the problem is for people that are nearsighted or farsighted and which type of lens they need  

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Topic 1.4 - Key Words:
  • Accommodation
  • Aqueous humor
  • Cones
  • Cornea
  • Farsighted
  • Impulses
  • Iris
  • Lens
  • Light

  • Nearsighted
  • Negative lens
  • Optic nerve 
  • Positive lens
  • Pupil
  • Retina
  • Rods
  • Sclera
  • Vitreous body

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1.4 - Electromagnetic spectrum:
Light is a form of energy that travels in waves
The whole spectrum spans a range of waves and frequencies
Part we can see: visible part of the spectrum
Part we cannot see: infrared and ultraviolet part of the spectrum



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1.4 - Electromagnetic spectrum:

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1.4 - Eyes

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1.4 - Eyes

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1.4 - Seeing color
Light reacts to cells in the retina.
The cells react to light and send impulses, messages, to your brain

Two different types of cells:
  • Rod cells give information on contrast, the black and white picture
  • Cone cells give information on color: red, green and blue


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1.4 - Accomodation
Accommodation: the lens changes its shape in order to see objects sharply from both far away and nearby

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1.4 - Nearsighted and farsighted

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Homework:
Theory lesson:
  • Complete exercises of Topic 1.4 in your textbook (p32-38)
  • Study Glossary of Topic 1.4 in StudyGo


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