Practice Test 2 – Chapter 11:The Human Eye And The Colourful World

If the power of an eye lens increases, then the defect of vision so produced is known as

A far-sighted person cannot focus distinctly objects closer than 120 cm. The lens that will permit him to read from a distance of 40 cm will have a focal length:

A person cannot see object clearly that are closed that 

A man wearing glasses of focal length + 1m cannot clearly see beyond 1 m

A ray of light containing both red and blue colours is incident on the refracting surface of a prism. Then,

A person cannot see distant objects clearly. his vision can be corrected by using the spectacle containing :

The principle section of a glass prism is isosceles triangle ABC with AB=AC, the face AC is silvered. A ray of light is incident normally on the face AB and after two reflections, it emerges from the base BC perpendicular to the base. Angle of BAC of the prism is

A young man has to hold a book at arm's length to be able to read it clearly. The defect of vision is:

The phenomenon of splitting of sunlight by a prism is called_________ and the color that deviates most is ______

An old person is able to see an object nearest to 1 m.What should be the power of lens required so that he can see an object placed at nearest distance of distinct vision?

A man wearing glasses of power +2D, can read clearly a book placed at a distance of 

A person is suffering from myopic defect. He is able to see clear objects placed at 

Which of the following statements is correct concerning the passage of white light into a glass prism?

A person can not see the distant objects clearly (though he can see the nearby object clearly). He is suffering from the defect of vision called:

To remove myopia (short-sightedness) a lens of power 

A person can see clearly objects only when they lie between 50cm and 400cm from his eyes. In order to increase the maximum distance of distinct vision to infinity, the type and power of the correcting lens, the person has to use, will be?

What is the common phenomena of light between random wavering of flickering of objects seen through a turbulent stream of hot air, advance sunrise and delayed sunset and twinkling of stars?

A person suffering from short-sightedness can see clearly only upto a distance of 2 metres. Find the power of the lens required to correct his vision

Though a woman can see the distant objects clearly, she cannot see the nearby object clearly. She is suffering from the defect called :

A student of class