Optics Terms Luminous, non-luminous, incandescent, fluorescent, phosphorescent, chemiluminescent, bioluminescent, triboluminescent, electromagnetic spectrum, ray diagram, primary colours, secondary colours, additive theory, subtractive theory, absorption, transmission, reflection, refraction, opaque, translucent, transparent, total internal reflection, plane mirror, regular reflection, diffuse reflection, concave mirror, convex mirror, converging, diverging, lens, focal point, principle axis, real image, virtual image, inverted,. 1. Draw a labeled sketch of the electromagnetic spectrum. Which end has the longest wavelength? Where is the 'visible spectrum? 2. complete the diagram by drawing in the transmitted rays: white light what colour(s) are absorbed? RGB what colour(s) are transmitted? blue film 3. Use a diagram to explain what colour a red strawberry would appear when a magenta light is shone on it. 4. Draw a labeled sketch that illustrates the laws of reflection. Label: incident ray, reflected ray, angle of incidence, angle of reflection, normal 5. What do the letters SALT refer to when describing an image? S: A: L: T:\f9. Complete the following chart: (SALT for images in mirrors and lenses) Image Location of Object S A L T Outside C Between C & F At C Concave mirror At F Between F & V Any position in front of mirror Convex mirror Any position in front of mirror Plane mirror close Converging lens far 10. List at least 2 practical uses for each of the following optical devices. Explain why they would be used: a. Plane mirror b. Concave mirror c. Convex mirror d. Converging lens e. Diverging lens 11. What is the difference between reflection and refraction