Ray Optics and Optical Instruments

Reflection and Refraction

Reflection follows the law that the angle of incidence equals the angle of reflection, while refraction follows Snell's Law, describing how light bends when passing from one medium to another.

Total Internal Reflection (TIR)

When light travels from an optically denser to a rarer medium at an angle greater than the critical angle, it reflects completely back into the denser medium.

Refraction at Spherical Surfaces and Lenses

Light refracting through curved boundaries and lenses is governed by specific radius-of-curvature relations, culminating in the Lens Maker's Formula used to design lenses of desired focal lengths.

Refraction through a Prism

Light passing through a triangular prism deviates from its path, leading to the relation connecting angle of prism, angle of incidence, angle of emergence, and angle of deviation.

Optical Instruments

Devices like microscopes and telescopes use combinations of lenses and mirrors to magnify images of tiny or distant objects for better viewing.