(8)State the four fundamental laws in geometrical optics.
Answers
Answer:
Law of rectilinear propagation: According to the law of rectilinear propagation, the light will travel in a straight line in the region of constant refractive index.
Law of reflection: The law of reflection states that when a ray of light gets reflected, the angle of reflection will be equal to the angle of incidence. The incident ray reflected ray and the normal are on the same plane.
Law of refraction: The law of refraction is also known as Snell’s law. When a ray of light is refracted at the interface, the incident ray, refracted ray and the normal will are on the same plane. The sine of the angle of refraction is proportional to the angle of incidence.
Answer:
We define a ray as the path along which light energy is transmitted from one point to another in an optical system. The basic laws of geometrical optics are the law of reflection and the law of refraction. If not being reflected or refracted, a light ray travels in a straight line