Ray Optics and Optical Instruments - Introduction | Class
12 Physics 2022-23
Introduction to Ray Optics
In this video, we will be discussing the basics of optics and optical instruments. We will start
by discussing ray optics, which deals with the behavior of light as it travels in straight lines.
Ray optics is based on Newton's corpuscular theory, which states that light is made up of
particles called corpuscles.
Light has both wave and particle-like properties, and its behavior can be studied through
both ray optics and wave optics. In this video, we will focus on ray optics and cover topics
such as reflection, refraction, and optical instruments like lenses, microscopes, and
telescopes.
Newton's Corpuscular Theory and Reflection of Light
Newton's corpuscular theory explains the rectilinear propagation of light and its reflection off
surfaces. When a light ray is incident on a surface and bounces back, it is called reflection.
The angle of incidence is equal to the angle of reflection, as explained by the laws of
reflection. Reflection can be observed in plane and spherical mirrors.
Refraction of Light
Refraction occurs when a light ray passes through a medium with a different refractive index,
causing it to bend. The degree of bending depends on the angle of incidence and the
refractive indices of the two media involved. Snell's law describes the relationship between
the angle of incidence and the angle of refraction.
Dispersion of Light
12 Physics 2022-23
Introduction to Ray Optics
In this video, we will be discussing the basics of optics and optical instruments. We will start
by discussing ray optics, which deals with the behavior of light as it travels in straight lines.
Ray optics is based on Newton's corpuscular theory, which states that light is made up of
particles called corpuscles.
Light has both wave and particle-like properties, and its behavior can be studied through
both ray optics and wave optics. In this video, we will focus on ray optics and cover topics
such as reflection, refraction, and optical instruments like lenses, microscopes, and
telescopes.
Newton's Corpuscular Theory and Reflection of Light
Newton's corpuscular theory explains the rectilinear propagation of light and its reflection off
surfaces. When a light ray is incident on a surface and bounces back, it is called reflection.
The angle of incidence is equal to the angle of reflection, as explained by the laws of
reflection. Reflection can be observed in plane and spherical mirrors.
Refraction of Light
Refraction occurs when a light ray passes through a medium with a different refractive index,
causing it to bend. The degree of bending depends on the angle of incidence and the
refractive indices of the two media involved. Snell's law describes the relationship between
the angle of incidence and the angle of refraction.
Dispersion of Light
