Refractive index - is the ratio of speed of light in vacuum to the speed of light in the medium, Critical angle - is the angle of incidence in the optically denser medium when the angle of refraction in the less dense medium is 90°, Focal point - is the point on the principal axis of the lens whereby all light rays parallel to the principal axis converge to after passing through the lens, Focal Length - is the distance between the principal focus and the optical centre of the lens, Reflection - The rebounding of light at a surface, Incident ray - the light ray that hits the reflecting surface, Normal - is the perpendicular to the reflecting surface at the point of incidence, Reflected ray - the light ray that bounces off the reflecting surface, Angle of incidence - the angle between the incident ray and the normal, Angle of reflection - the angle between the reflected ray and the normal, Refraction - is the change in direction when a light ray passes from one medium to another at a glancing angle, Total internal reflection - is the complete reflection of a light ray inside an optically denser medium at its boundary with an optically less dense medium, Real Image - is an image that can be captured on a screen, Virtual Image - is an image that cannot be captured on a screen,

Physics Definition Chapter 10

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