
✒Can anybody explain main points of chapter-10 light-reflection and refraction.?
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Answers
Answer:
Light is a form of energy that enables us to see things. Light starts from a source and bounces off objects which are perceived by our eyes and our brain processes this signal, which eventually enables us to see.
Nature of Light
Light behaves as a:
ray, e.g. reflection
wave, e.g. interference and diffraction
particle, e.g. photoelectric effect
Laws of Reflection
Light incident on another medium
When light travels from one medium to another medium it either:
- gets absorbed (absorption)
- bounces back (reflection)
- passes through or bends (refraction)
When light is incident on a plane mirror, most of it gets reflected, and some of it gets absorbed in the medium.
A medium that is polished well without any irregularities on its surface will cause regular reflection of light. For example, a plane mirror. But even then some light gets absorbed by the surface.
Laws of Reflection
The incident ray, reflected ray and the normal all lie in the same plane. Angle of incidence = Angle of reflection
Answer:
Reflection and refraction. Light rays change direction when they reflect off a surface, move from one transparent medium into another, or travel through a medium whose composition is continuously changing. ... The reflected ray is always in the plane defined by the incident ray and the normal to the surface.
Reflection is when light bounces off an object. If the surface is smooth and shiny, like glass, water or polished metal, the light will reflect at the same angle as it hit the surface. This is called specular reflection.
Reflection is Independent of color. That means all light of different color will follow the same path after the reflection if they incident at same