Human Eye and C...

At sun rise or at sun set the sun appears to be reddish while at mid day it looks white. This is because

A person cannot see objects clearly which are nearer than 75 cms from his eyes, the disease he is suffering from is:

A person can see clearly up to 3 metres what should be the power of the lens in his spectacles so that he could see clearly up to 12 metres.

Reflection of the sunlight from the upper layers of the Earth's atmosphere causes

Figure (a), (b), and (c) respectively, indicate the point of focus in case of :

Long-sightedness is caused by the eyeball being too short. It can be corrected by the use of a :

Hypermetropia is due to the ________ of the eye.

A person cannot see the objects clearly placed at distance more than $$40\ cm$$. He is advised to use lens of power:

A near sighted person cannot see distinctly beyond $$50   cm$$ from his eye. The power in diopter of spectacle lenses which will enable him to see distant objects clearly is:

Figures (a), (b), (c) and (d) respectively correspond to