Physics Quiz - Light and Optics
 1. Light is composed of waves and particles called:A electronsB quarksC photons 2. The visible spectrum of light from the longest to shortest wavelength is:A violet, indigo, blue, green, yellow, orange, redB infrared, ultraviolet, gamma, Xrays, microwavesC red, orange, yellow, green, blue, indigo, violet 3. The speed of light in a vacuum is:A 300 000 km/sB 300 000 m/sC 1 000 000 m/s 4. When light rays reflect off a plane mirror, the angle of incidence:A is greater than the angle of refractionB is less than the critical angleC equals the angle of reflection 5. The bending of light as it travels from one medium to another is:A reflectionB imagingC refraction 6. When a light travels from a more dense material such as glass to a less dense material such as air, the light ray refracts:A in the same direction as the incident rayB away from the normal lineC towards the normal line 7. When a light ray refracts from air to water, the angle of refraction is:A less than the angle of incidenceB the same as the critical angleC more than the angle of incidence 8. A transparent object with flat surfaces that is used to separate the visible light spectrum into its different colours is called a:A laserB prismC lens 9. When light rays travel at a critical angle through an object such as optical fibre, they are:Atotally internally reflectedBrefracted out of the fibreCtermed "critically angled" 10. An image is called real or: Aimaginary Bvirtual Cunreal 11. An upside down image is called: Alateral Berect Cinverted 12. A magnifying glass is an example of a: Aconvex lens Bconcave lens Cprism 13. Convex lenses converge light rays to a: Areal erect image Bfocus Cvirtual image 14. An example of a diverging lens that spreads light rays is the: Aconvex lens Bconcave lens Cconverging lens 15. An object under white light which reflects green light and absorbs the other six colours of the spectrum will appear the colour of: Amostly red-orange Bblue-purple Cgreen

 Your AnswersQ 1: Q 2: Q 3: Q 4: Q 5: Q 6: Q 7: Q 8: Q 9: Q10: Q11: Q12: Q13: Q14: Q15: Correct AnswersQ 1: Q 2: Q 3: Q 4: Q 5: Q 6: Q 7: Q 8: Q 9: Q10: Q11: Q12: Q13: Q14: Q15: