SNC2D Optics Review Solutions PDF

Name:_______________________ SNC2D Optics Review Solutions 1. a) Define each of the following terms: Source Light produced by…. Chemiluminescence Chemical reaction or no increase...

Name:_______________________ SNC2D Optics Review Solutions 1. a) Define each of the following terms: Source Light produced by…. Chemiluminescence Chemical reaction or no increase in temperature Ex. glow stick Bioluminescence Chemiluminescence in a living organism Fluorescence Material absorbs UV light and immediately emits it Electric Discharge Passing an electric current through a gas Phosphorescence Material absorbs UV light and emits it over time Ex. glow in the dark Incandescence Produces light as a result of high temperatures Triboluminescence Scratching, rubbing, crushing certain crystals b) Match each term on the left with the most appropriate definition on the right __ii__ transpararent i) produces its own light __iii_ transluscent ii) allows light to pass through easily __i__ luminous iii) allows some light to pass through __iv_ opaque iv) does not allow any light to pass through 2. Label the electromagnetic spectrum below with the terms used to describe different wavelengths All electromagnetic (light) waves travel at a speed of ___3 x 108 m/s___ in a vacuum. 3. a) What is the Law of Reflection? __the angle of incidence is equal to the angle of reflection__ b) Draw a diagram to illustrate this law: 4. Use the equal perpendicular method to locate and draw the reflected image: 5. A 4.0 cm tall object is placed 30 cm from a concave mirror with a focal length of 10 cm. a) At what distance will the image be formed? Is the image virtual or real? b) How tall is the image? What is the attitude of the image? 6. A convex mirror with a focal length of 5 cm produces an image of an object 15 cm away from the mirror. a) What is the distance of the image from the mirror? b) What is the magnification? 7. Complete the following ray diagrams. Use S.A.L.T to describe the image formed. 8. What is refraction? _The bending or change in direction of light when it travels from one medium to another_ 9. A block of glass has an index of refraction of 1.5. Calculate the speed of light in the glass. Show a GRASP solution. 10. Light is incident on the surface of the glass at an angle of 35˚. It refracts at an angle of 22.1˚. Calculate the index of refraction of the glass. 11. Using the Figure 1 : a) In which medium will light travel slower? _material B because the angle of refraction is smaller so it looks like it bent towards the normal line___ b) Which medium has the greater index of refraction? __material B because light travels slower through denser mediums__ Figure1 12. Under what conditions can total internal reflection occur? __when you go from a denser medium to a less dense medium and when the angle of incidence is greater than the critical angle_____ 13. What is the critical angle of a light ray travelling in water to ice with a refractive index of 1.31? 13. Complete the ray diagrams for the following lenses. Use S.A.L.T. to describe the image formed: 14. Draw a cross-section of the human eye and label the cornea, lens, iris, optic nerve and the retina. Where does most of the refraction in the eye occur?________cornea___________________________ Which part of the eye is most like the film of a camera?________retina_________________________ What is myopia?__”near sightedness” so can see nearby objects but not far away objects__________ How is it corrected?__with a diverging lens_______________________________________________ Explain why:___the lens will bring the image of the object back onto the retina since the issue for myopia is that the image is produced before the retina______________________________________________ Draw a diagram of it being corrected: What is hyperopia?__”far sightedness” so can see far away objects but not nearby objects__________ How is it corrected?___with a converging lens______________________________________________ Explain why:___the lens will bring the image of the object back into the retina since the issue for hyperopia is that the image is produced beyond and outside of the retina_________________________________ Draw a diagram of it being corrected: What is presbyopia?___”far sightedness” caused from eyes losing elasticity which causes a loss of accommodation, this happens with age_____________________________________________________ How is it corrected?____with a converging lens_______________________________________________ Explain why:___the lens will bring the image of the object back into the retina since the issue for hyperopia is that the image is produced beyond and outside of the retina_________________________________ What is astigmatism?___the cornea is not perfectly round causing blurry vision__________________ 15. Draw the image using laws of reflection.