Facts about Visible Light

Name Date Facts about visible light Answer the questions below. 1. When white light is refracted through a prism, different colours emerge. Where do the different colours come from? White light is a mixture or 'blend' of all the other colors. The prism separates the blend into _____________________________________________________________________________ the individual colors. _____________________________________________________________________________ _____________________________________________________________________________ 2. Explain why all colours refract at different angles. Each color has its own wavelength and frequency, and thus bends at different _____________________________________________________________________________ amounts when they pass through a prism. _____________________________________________________________________________ _____________________________________________________________________________ 3. When does light refract or bend? Light will refract when it enters another substance eg. air to water, or glass to air. _____________________________________________________________________________ _____________________________________________________________________________ 4. Which colour in the visible spectrum has the longest wavelength? _____________________________________________________________________________ Red 5. Which colour in the visible spectrum has the shortest wavelength? Violet _____________________________________________________________________________ 6. Explain how you can cause light separated by a prism to combine. Separated light can be recombined when it goes through another prism. _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ 7. Which has a higher frequency, yellow light or blue light? Blue light _____________________________________________________________________________ 8. Why does a violet dress appear to be violet in sunlight? A violet dress appears violet because all the colors except violet are absorbed, and violet _____________________________________________________________________________ is reflected. _____________________________________________________________________________ 9. List three colours that can combine to produce all the colours of the rainbow. Red, Green, Blue _____________________________________________________________________________ Name Date Visible light Vocabulary absorbed amplitude colour frequencies prism reflected reflection refracted refraction ROY G BIV spectrum visible light wave model of light wavelengths white light Use the terms in the vocabulary box to fill in the blanks. Use each term only once. You will not need to use every term. Wave Model of Light 1. The ____________________________________ describes light travelling as a wave. Visible Light 2. ____________________________________ is light that you can see. 3. The bending or changing direction of a wave as it passes from one material to another is called ______________________________________________. Refraction Wavelengths 4. White light is made up of waves having different _________________________________ Frequencies and ____________________________________________. Color 5. Sir Isaac Newton demonstrated that ____________________________________ is a property of visible light. Prism 6. A ____________________________________ refracts light into different colours. Refracted 7. When passed through a second prism, the _________________________________ light is combined to form white light once again. 8. The seven colour categories of visible light are together known as the visible Spectrum ____________________________________. 9. You can remember the order of the seven colours of the rainbow by using this abbreviation: ____________________________________. ROYGBIV 10. A fire engine appears to be red because the colour red is ____________________________________. Reflected 11. A black shirt appears black because all colours are Absorbed ____________________________________.