The visible spectrum
Lesson 3 / 7
Lesson video
Lesson slides
Lesson details
Lesson outcome
Waxaan sharxi karaa waxa iftiinka cad yahay, iyo sababta loo soo saari karo qaybta iftiinka ee la arki karo (visible spectrum) oo ka timaada iftiinka cad.
Introduction
In this lesson: I can describe what white light is, and explain why a visible spectrum can be produced from white light. White light from the Sun and light bulbs consists of light of all the colours in the visible light spectrum (a rainbow). A transparent triangular prism can split up sunlight into a visible light spectrum.
Show transcript
Worksheet
not available yet
Quizzes
1. A person has an object that they can see through clearly. The object transmits light so it can be described as being...
- Correct answer:transparent.
- translucent.
- opaque.
- invisible.
2. How many types of cone cell are in the eye of a person who has full colour vision?
- 0
- 1
- 2
- Correct answer:3
3. Which of the following explains why we see mainly in shades of grey in dim light?
- The pupil becomes larger in dim light.
- The rod cells do not work well in dim light.
- Correct answer:The cone cells do not work well in dim light.
- The cone cells all become equally sensitive in dim light.
4. The screen on a mobile phone shows a yellow banana. Which of the following explains how it does this?
- The screen contains yellow coloured dye.
- The screen has tiny yellow lights, and these lights are switched on.
- Correct answer:The screen displays two colours of light and neither of these is yellow.
- The screen splits white light into a rainbow of colours and shows the yellow.
1. A rainbow shows the colours that white light can be separated into. They are always in the same order. This is called the visible light...
- band.
- plectrum.
- range.
- scale.
- Correct answer:spectrum.
2. The diagram shows a 3D shape called a __________. When this shape is made out of glass or clear plastic, it can split white light into its component colours.
- polygon
- pyramid
- triangle
- tetrahedron
- Correct answer:triangular prism
3. Which of the following statements describes how a rainbow is made?
- Each raindrop makes all of the colours of light.
- Different raindrops make different colours of light.
- Correct answer:Raindrops split white light into all of its colours.
- Raindrops absorb some colours of white light but not the colours of the rainbow.
4. Which of the following can look like white light when it enters our eyes at the same time?
- a combination of equal brightness of red and green light
- Correct answer:a combination of equal brightness of red, green and blue light
- a combination of equal brightness of red, yellow and blue light
- Correct answer:a combination of equal brightness of all of the colours of visible light
5. A person looks at a television screen and sees cyan, a secondary colour of light. Which of the following statements are correct?
- The colour cyan does not appear in a rainbow.
- Light from the screen is detected by the R cone cells of the person’s eyes.
- Correct answer:Light from the screen is detected by the G cone cells of the person’s eyes.
- Correct answer:Light from the screen is detected by the B cone cells of the person’s eyes.
- Correct answer:The signal to their brain is the same as when they see a cyan object.
What pupils see
The same lesson as a pupil sees it. You can set any section as work on its own.
- IntroductionPrepare
- Starter quizActivate · 4 questions
- Lesson videoLearn
- Exit quizCheck · 5 questions