Questions in Ray Optics and Optical Instruments

Select	Question
	The human eye has a lens which has a
	A man with defective eyes cannot see distinctly object at the distance more than 60 cm from his eyes. The power of the lens to be used will be
	A person's near point is 50 cm and his far point is 3 m. Power of the lenses he requires for (i) reading and (ii) for seeing distant stars are
	A person wears glasses of power – 2.5 D. The defect of the eye and the far point of the person without the glasses are respectively
	Myopia is due to
	A person is suffering from the defect astigmatism. Its main reason is
	A person cannot see objects clearly beyond 2.0 m. The power of lens required to correct his vision will be
	The resolving limit of healthy eye is about
	When objects at different distances are seen by the eye, which of the following remains constant
	A person wears glasses of power – 2.0 D. The defect of the eye and the far point of the person without the glasses will be