Question
A soap bubble shows colours when illuminated with white
light. This is due to –Solution
The iridescent colours of soap bubbles are caused by interfering of (internally and externally) reflected light waves and are determined by the thickness of the film. This phenomenon is not the same as the origin of rainbow colours (caused by the refraction of internally reflected light), but rather are the same as the phenomenon causing the colours in an oil slick on a wet road.
- A committee of 5 members is to be selected from 4 girls and 6 boys. Find the number of ways to form team such that the team consists of at most 2 girls.
A letter is randomly selected from the word "DETACHMENT." What is the probability that the selected letter is a vowel?
Determine the total number of ways to form a committee consisting of 10 members from a pool of 8 men and 7 women, ensuring the committee includes at lea...
In how many distinct ways can the letters of the word "MANAGEMENT" be arranged so that all the vowels are always together? (Assume identical letters are...
In how many ways can the letters of the word ‘BANANA’ be arranged?
Five toys out of which 2 are identical robots and the rest are different action figures are to be arranged in a row. Find the number of arrangements in ...
Find the quantity of methods of picking 4 cards from a set of 52 playing cards if four cards are of the same unit?
...
In a group of 9 boys and 5 girls, 5 students have to be selected. In how many ways it can be done so that only 2 boys are included.
How many different words can be formed with the letters of the word PRACTICE such that each of the word begin with E and ends with R?
You have 4 distinct cubes and 2 distinct balls. Find the number of ways to arrange them such that all 4 cubes are not placed together.
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