Points to Remember

Optics (Science)

Points to Remember

·                 Light is a form of energy which travels along a straight line

·                 The deviation in the path of light ray is called refraction.

·                 The ratio of speed of light in vacuum to the speed of light in a medium is defined as refractive index ‘µ’ of that medium.

·                 Lens formula

·                 Magnification (m) = h' /h =  ν /u

·                 Power of lens. P = 1/f

·                 The ability of the eye to focus nearby as well as the distant objects is called power of accommodation of the eye.

·                 A microscope is an optical instrument which helps us to see the objects which are very small in dimension.

·                 Telescope is an optical instrument used to see the distant objects clearly.