Explain how the angles of incidence ,reflection and refraction
varies as we change mediums(to air, water and glass)?
Pls answer grade 7 level.
Answers
Answer:
The angle of refraction is greater than the angle of incidence. As the angle of incidence is increased, the angle of refraction also increases. At a certain angle of incidence, the light will refract 90 degrees and travel along the boundary between the two media. This angle of incidence is called the critical angle.
Answer:
Refraction is the bending of the path of a light wave as it passes across the boundary separating two media. Refraction is caused by the change in speed experienced by a wave when it changes medium. In Lesson 1, we learned that if a light wave passes from a medium in which it travels slow (relatively speaking) into a medium in which it travels fast, then the light wave would refract away from the normal. In such a case, the refracted ray will be farther from the normal line than the incident ray; this is the SFA rule of refraction. On the other hand, if a light wave passes from a medium in which it travels fast (relatively speaking) into a medium in which it travels slow, then the light wave will refract towards the normal. In such a case, the refracted ray will be closer to the normal line than the incident ray is; this is the FST rule of refraction. These two rules regarding the refraction of light only indicate the direction that a light ray bends; they do not indicate how much bending occurs. Lesson 1 focused on the topics of "What causes refraction?" and "Which direction does light refract?" Lesson 2 will focus on the question of "By how much does light refract when it crosses a boundary?"