White light can be split into the colors of the visible light spectrum through the process of dispersion. When light passes through a prism, it refracts differently depending on wavelength - red light refracts the least and violet light refracts the most. This separates white light into the colors of the rainbow spectrum: red, orange, yellow, green, blue, indigo, and violet. The document discusses light dispersion, spectrum, refractive index, reflection and refraction.

1. LIGHT DISPERSION AND SPECTRUM How many colours are there in light? How possible is it to split white light into different colours? www.sciencetutors.zoomshare.com

2. LIGHT DISPERSION AND SPECTRUM TASK 3 Explain the following concepts Light dispersion Spectrum List the colours in the spectrum www.sciencetutors.zoomshare.com

3. Light Dispersion The separation of light into different colour is called LIGHT DISPERSION. www.sciencetutors.zoomshare.com

4. Li ght Di spers ion This spreading out of the beam of light is called dispersion or chromatic dispersion. This can be seen when sunlight passes through a glass prism. www.sciencetutors.zoomshare.com

5. GLASS PRISMS AND LIGHT REFRA CTION Glass prisms are often used to bend light in a given direction as well as to bend it back again (also known as retro reflection). www.sciencetutors.zoomshare.com

6. LIGHT SPECTRUM Which is the Least refracted and The most refra cted www.sciencetutors.zoomshare.com

7. LIGHT SPECTRUM The Least refracted is RED The most refra cted is VIOLET www.sciencetutors.zoomshare.com

8. REFR ACTI VE INDEX AND WAVE - LENGTH The velocity of light in a material, and thus its index of refraction depends on the wavelength of the light. 1.510 700 nm Red 1.517 550 nm Yellow 1.528 434 nm Blue Refractive index Wavelength Colour

9. REFLECTION What is light reflection? Reflection occurs when light bounces off a polished surface (like a mirror) and changes direction as a result. mirror Reflected ray Incident ray Normal www.sciencetutors.zoomshare.com

10. LAWS OF REFLECTION State the laws of Reflection What is the relationship between the incident angle and angle of reflection

11. REFLECTION AND REFRACTION Starter Write down 10 everyday uses of mirrors or reflections in everyday life. www.sciencetutors.zoomshare.com

12. REFLECTION AND REFRACTION Starter Answer 10 everyday uses of mirrors or reflections in everyday life. Draw a spider diagram of ideas : may include periscope, reflective clothing, lateral inversion (ambulance) signs, kaleidoscope, dental mirror, fibre optic lights, one way mirrors, laser energy displays www.sciencetutors.zoomshare.com

13. REFRACTION What is light refraction? Refraction is the bending of light as it travels or passes between materials of different optical density. Example: Light travelling from air to glass, air to water, water to air or glass to air www.sciencetutors.zoomshare.com

14. Examples of refraction Image showing effect of refraction between two media-air and glass. Acknowledgement: Above image was copied from www.dailyautocad.com /.../

15. Examples of refraction Image showing effect of refraction between two media-air and water.

16. WHITE LIGHT What are primary colours? How many primary colours are there in light? What are the three primary colours in light? www.sciencetutors.zoomshare.com

17. COLOURS OF WHITE LIGHT The following are the primary colours of light. When these three colours are mixed, our eyes see them as white light. RED GREEN BLUE www.sciencetutors.zoomshare.com

18. REFLECTION AND REFRACTION Starter Write down 10 everyday uses of mirrors or reflections in everyday life. www.sciencetutors.zoomshare.com

19. What is the colour made when the following colours overlap? Red + Green > Green + Blue > Red + Blue + Green > www.sciencetutors.zoomshare.com