The refractive index of many materials (such as glass) varies with the wavelength or colour of the light used, a phenomenon known as dispersion. This causes light of different colours to be refracted differently and to leave the prism at different angles,creatinganeffectsimilartoarainbow.In optics, dispersion is the phenomenon in which the phase velocity of a wave depends on its frequency, or alternatively when the group velocity depends on the frequency.
If 3792 = 39 and 7242 = 22, then 2958 = ?
How many seconds will a train 60 m in length, travelling at the rate of 40 km an hour, take to pass another train 90 m long, proceeding in the same dire...
If 2 is added to all the odd place digits and 1 is subtracted from all even place digits (from the left end) in ‘634715247’ and then all the digits ...
How many pair of digits in forward and backward direction are there in the number “9257364” that has as many numbers between them as in the ...
Select the option in which the numbers are related in the same way as are the numbers of the following set.
(18, 6, 36)
4863
x 1211
If ‘ x' is the resultant of the first row, what is the resultant of the second row?
...If each of the letters in the English alphabet is assigned odd numerical value beginning A = 1, B = 3 and so on, what will be the total value of the let...
If all the digits of each number are added, the sum of which number will be the largest?
Some equations are solved on the basis of a certain system. Find the correct answer for the unsolved equation on that basis.
11 * 7 = 72, 14 * 7 ...
Select the number that can replace the question mark (?) in the following series. 17, 21, 30, 46, 71, ?
