Ray Optics Test...

The impact of an image on the retina remains for

A person is suffering from myopic defect. He is able to see clear objects placed at 15 cm. What type and of what focal length of lens he should use to see clearly the object placed 60 cm away

The sensation of vision in the retina is carried to the brain by

When the power of eye lens increases, the defect of vision is produced. The defect is known as

A man is suffering from colour blindness for green colour. To remove this defect, he should use goggles of

In human eye the focusing is done by

A short sighted person can see distinctly only those objects which lie between 10 cm and 100 cm from him. The power of the spectacle lens required to see a distant object is

A person can see clearly only upto a distance of 25 cm. He wants to read a book placed at a distance of 50 cm. What kind of lens does he require for his spectacles and what must be its power

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