More About Refraction

Draw the light ray. The light ray is passing from air to glass. Fill in spaces of the sentence with the words that make sense based on the above drawing. When the light ray passes from the air to the glass, the angle of refraction is less than the angle of incidence. This is because the glass is denser than the air. When it enters the glass, the light ray bends toward the normal. Draw as a light ray travels from a glass block to the air. Fill in spaces of the sentence with the words that make sense based on the above drawing. When the light ray passes from the glass to the air, the angle of refraction is greater than the angle of incidence. This is because the air is less dense than the glass. When it enters the air, the light ray bends away from the normal. Draw a light ray as it travels from water to air. Fill in spaces of the sentence with the words that make sense based on the above drawing. The angle in the air is greater than the angle in the water. The light ray bends away from from the normal when it enters the air. Draw the light ray as it travels from a plastic block to a glass block. (Glass is denser than plastic). Fill in spaces of the sentence with the words that make sense based on the above drawing. The angle of the light ray in the plastic is greater than the angle of the light ray through the glass. The light ray bends toward the normal when it enters the glass. Use the chart on the textbook, page 205 to complete the chart on how light behaves. Type of Behaviour What happens to light striking a surface? Nature of surface What else happens? Absorption Changes into some other kind of energy Occurs mostly on dark, opaque surfaces Some light is usually reflected off Reflection Bounces off the surface and travels in new direction Occurs best when light hits a smooth shiny surface Some light is usually absorbed Refraction Travels through the surface often in a new direction Occurs when light strikes a different, transparent medium Some light is usually reflected off the surface.