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. SOLVED PROBLEMS Problem Light rays travel from vacuum into a glass whose refractive index is .
. If the angle of incidence is °, calculate the angle of refraction inside the glass. Solution: accorting to Snell’s law, sin i sin r m sin i = m sin r Here m = . , m = .