guys can i get 10th light refraction and reflection notes
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Answers
Explanation:
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Answer:
Reflection of Light: The phenomenon of bouncing back of light into the same medium by the smooth surface is called reflection.
Incident light: Light which falls on the surface is called incident light.
Reflected light: Light which goes back after reflection is called reflected light.
The angle of incidence: The angle between the incident ray and the normal.
An angle of reflection: The angle between the reflected ray and the normal.
Mirror: The surface which can reflect the light is a mirror.
Plane Mirror: If the reflecting surface is a plane then the mirror is plane.
Spherical Mirror: If the reflecting surface is part of the hollow sphere then the mirror is a spherical mirror.
The spherical mirror is of two types:
mirror: In this mirror reflecting surface is convex. It diverges the light so it is also called a diverging mirror.
Concave mirror: In this mirror reflecting surface is concave. It converges the light so it is also called converging mirror.
Parameters of Mirror:
spherical mirror is reflected back making same angle with principal axis.
Use of Concave Mirror: It is used as a makeup mirror, the reflector in torches, in headlights of cars and searchlights, doctor’s head-mirrors, solar furnace, etc.
1. Light travels in a straight line.
2. Light gets reflected when it falls on polished surfaces; like mirrors.
3. Light suffers refraction when it travels from one medium to another.
4. There is a change in the wavelengths!light when it moves from one medium into another.
5. The bouncing back of light when it strikes a smooth or polished surface is called reflection of light. Reflection is of two types; Specular or regular and Diffuse or irregular reflection.
6. The angle of incidence is equal to the angle of reflection. Mathematically, we have ∠i = ∠r.
7. The image is as far behind the mirror as the object is in front.
8. The image is unmagnified, virtual and erect.
9. The image has right-left reversal.
10. Focal length of a plane mirror is infinity.
11. Power of a plane mirror is zero.