Questions in Ray Optics and Optical Instruments

Select	Question
	How should people wearing spectacles work with a microscope
	A man who cannot see clearly beyond 5 m wants to see stars clearly. He should use a lens of focal length
	A man can see only between 75 cm and 200 cm. The power of lens to correct the near point will be
	Image is formed for the short sighted person at
	A man can see the objects upto a distance of one metre from his eyes. For correcting his eye sight so that he can see an object at infinity, he requires a lens whose power is
	A man can see the object between 15 cm and 30 cm. He uses the lens to see the far objects. Then due to the lens used, the near point will be at
	The far point of a myopia eye is at 40 cm. For removing this defect, the power of lens required will be
	A man suffering from myopia can read a book placed at 10 cm distance. For reading the book at a distance of 60 cm with relaxed vision, focal length of the lens required will be
	If the distance of the far point for a myopia patient is doubled, the focal length of the lens required to cure it will become
	A presbyopic patient has near point as 30 cm and far point as 40 cm. The dioptric power for the corrective lens for seeing distant objects is