Questions

Q:

In total internal reflection, the light travel from

A) rarer to denser medium and it occurs with no loss of intensity B) denser to rarer medium and it occurs with no loss of intensity
C) rarer to denser medium and it occurs with loss of intensity D) denser to rarer medium and it occurs with loss of intensity
 
Answer & Explanation Answer: B) denser to rarer medium and it occurs with no loss of intensity

Explanation:

According to wave theories, for Total internal reflection tohappen: Light must travel from denser medium to rarer medium. Angle of incidence should be greater than critical angle. As in case of TIR, the image is perfectly clear, it implies that there has been no loss of intensity.

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Q:

Optical fibre works on which of the following principle of light?

A) Reflection B) Refraction
C) Diffraction D) Total internal reflection
 
Answer & Explanation Answer: D) Total internal reflection

Explanation:
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Q:

In the following questions, one part of the sentence may have an error. Find out which part of the sentence has an error and click the button corresponding to it. If the sentence is free from error, click the “No error” option.

The angry bird flap (A) / her wings, flies a short (B) / distance and returns. (C) / No error (D)

A) A B) B
C) C D) D
 
Answer & Explanation Answer: A) A

Explanation:
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Q:

Select the word with the correct spelling.

A) sentreis B) surgeons
C) sibblings D) imolate
 
Answer & Explanation Answer: B) surgeons

Explanation:
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Q:

A sentence/a part of the sentence is underlined. Four alternatives are given to the underlined part which will improve the sentence. Choose the correct alternative and click the button corresponding to it. In case no improvement is needed, click the button corresponding to "No improvement".

A chance remark by her friend transported her life.

A) transgressed B) transposed
C) transformed D) No improvement
 
Answer & Explanation Answer: C) transformed

Explanation:
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Q:

In the following question, out of the four alternatives, select the alternative which best expresses the meaning of the idiom/phrase.

All thumbs

 

A) Permission from the concerned people to go ahead. B) A crowd cheering their favourite team.
C) Physically awkward, especially with respect to the hands. D) An illiterate person who cannot sign his name.
 
Answer & Explanation Answer: B) A crowd cheering their favourite team.

Explanation:
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Q:

In the following passage some of the words have been left out. Read the passage carefully and choose the correct answer for the given blank out of the four alternatives.

 


We have rich cultural _____ . Its roots go into _____. Ours has never been a closed ______. It has _______ just like a tree, ______ to external ______ but holding its roots _______. But one wonders today whether it will be able to hold its _____. The ______ of our cultural heritage has come under the _____ of western culture.

 


It has _______ just like a tree,

 

A) grown B) risen
C) expanded D) branched
 
Answer & Explanation Answer: A) grown

Explanation:
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Q:

In the following question, out of the four alternatives, select the word opposite in meaning to the word given.

Callow

A) Inexperienced B) Jejune
C) Sophisticated D) Juvenile
 
Answer & Explanation Answer: C) Sophisticated

Explanation:
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