Dispersion of white light by a glass prism with experiment and observations? Plz answer now! I request:
Answers
Answer:
From his experimental observations, Newton concluded that white light consists of a mixture of seven different colours. ... All colours are refracted towards the base of the prism, the violet being deviated the most and red the least. The splitting up of white light into its constituent colours is, called dispersion.
Explanation:
Because white light is made up of ALL visible wavelengths, its colors can be separated (dispersed) by this difference in behavior. When light passes through glass, it encounters TWO interfaces--one entering and the other leaving. ... The index of refraction for air is (almost) 1, while for glass it is about 1.5 (or so).
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Students can create their own prism with clear gelatin. Prepare the gelatin using half the amount of water recommended on the package and pour the gelatin into a square or rectangular mold such as a reusable plastic container or a a small baking pan. After the gelatin has hardened, remove it from the mold and cut into different prism shapes such as a semicircle, a wide middle with thin ends, or a thin middle with wide ends. Shine a flashlight through the gelatin to see how the light is dispersed and bent. Have students note how the light behaves differently when it passes through different prisms. Place a plastic comb between the flashlight and the gelatin prism and note how the lines from the comb make it easier to see the way the light is bent by the prism.
Students gain a better understanding of light behavior by observing the formation of a rainbow in a dark room. For this experiment use black construction paper to cover the flashlight beam, but first cut a small slit at the center of this piece of paper. Fill a small, clear, plastic tub with water and lean a mirror in the water at one end of the tub. Shine the light on the mirror. Hold up a blank white card to catch the reflected beam of light.