CHAPTER 9
Ray Optics and Optical Instruments
CHAPTER AT A GLANCE
Reflection of Light
The returning back of light in the same medium from which it has come after striking a smooth polished surface is called reflection of light. After reflection, velocity, wavelength and frequency of light remains same but intensity decreases.
Laws of Reflection
There are two laws for reflection of light from a smooth reflecting surface
- First Law: The angle of incidence is equal to the angle of reflection, i.e.
. - Second Law: The incident ray, the reflected ray and the normal at the point of incidence, all lie in the same plane. These laws are valid for plane as ...
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