Question
If a medium has a critical angle for total internal
reflection from the medium to vacuum as 90°, what is the velocity of light in the medium? (Take c = 3.0 × 108 m/s)Solution
If c is critical angle then Sin c = [(velocity of light in medium) / (velocity of light in vacuum)] sin 90° = [(v) / (3 × 108)] v = 3 × 108 × 1 v = 3 × 108 m/s
In each of the questions below four words are highlighted in the sentences. One of these four words printed in bold may be either wrongly spelt or inap...
Select the most appropriate synonym of the given word.
ACCURATE
Hover
A. Seagulls hover over the surging waves.
B. I saw some spies hovering my house.
C. Hard work never did anyone any hover .
In the question below, two sentences with one word in each highlighted in bold. From the options, choose the one that can replace the highligh...
Select the wrongly spelt word.
Directions: In each question below, word is used in four different ways. Choose the option in which the usage of the word is INCORRECT or INAPPROPRIATE....
Select the word which means the same as the group of words given.
Branch of physics dealing with the properties of sound
In the given question, a word has been given and there are three ways in which the word has been used, in similar or different forms. You need to see w...
The word is no longer in use.
Scandalous
A. The allegations of a scandalous incident have been circulating inside media offices for weeks now.
B. It is scandalous that ...
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