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
A factory has 3 machines A, B, and C. Machine A produces 40% of the total output, B produces 35%, and C the remaining. It is known that 5% of items fro...
Six women and two men can complete a task in 10 days. If the efficiency of a woman is twice that of a man, how many days will it ...
Find the greatest 3-digit number which when divided by 11 or 14 leaves a remainder of 3.
7Â Â Â Â 10Â Â Â Â Â Â 4 Â Â Â Â Â Â 13Â Â Â Â Â Â ? Â Â Â Â Â Â 16
...What is the purpose of the "Slide Master" feature in Microsoft PowerPoint?
188, 200, 219, ?, 278, 318
‘X’ and ‘Y’ are capable of finishing a work in 9 days and 12 days respectively. They worked together for 3 days. Find the number of days ‘Y’...
What term is used to refer readers to a specific source within the same document, such as a table or graph?
The value of 0∫π cos3x dx is –
Let A be a 3×3 matrix such that AT =−A and all diagonal entries are zero.
Which of the following is always true ?
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