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Some Topics of Physics

1. Mirror Formula :
It is a relation between distance of object, distance ofimage from the pole ofthe mirror and it’s focal length, i.e., relation between ‘u’, ‘v and It is given by
Science Class 10 Notes - Light (Reflection and Refraction)
12. Magnification : It is defined as the ratio of height of image to the height of the object. It is denoted by letter m.
Science Class 10 Notes - Light (Reflection and Refraction)

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Some topics of Physics

13. Refraction of Light :  The bending of ray of light when it passes from one medium to another is called refraction of light. Laws of Refraction : (i) The incident ray, the refracted ray and the normal at the point of incidence all lie in the same plane. (ii) When a ray of light undergoes refraction then the ratio of sine of angle of incidence to the sine of angle of refraction is constant. 14. The Refractive Index :  The refractive index of medium 2 with respect to medium is given by the ratio of the speed of light in medium 1 and the speed of light in medium 2. This is usually represented by the symbol n 21 . This can be expressed in an equation form as
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