Question
Danger signals are generally red as red light
–Solution
The primary reason why the colour red is used for danger signals is that red light is scattered the least by air molecules. The effect of scattering is inversely related to the fourth power of the wavelength of a colour. Therefore blue which has the least wavelength of all the visibleradiations is scattered the most and red which has the highest wavelength of all the colours we can see is scattered the least.
when x =4 and y =-6 then find the value of 27x³ +58x²y +31xy² +8y³?
Simplify the expression:
3x + 5y - [(7x + 3y) - (2x + y) + 4y] - xA man covered 40 km by bus and rest 25 km on foot. If the speed of the bus is 150% more than that of the man and the whole distance is covered in 2 hour...
If (6x + y) = 180 and 5x:2y = 25:12, then find the value of (2x² + 5y²).
If (a + b)2 = 18 + c2, (b + c)2 = 22 + a2 and (c + a)2 = 24 + b2, then find the va...
If both the roots of x 2 + kx + 49 = 0 are real and equal, then find the value of 'k'.
If √b + (1/√b) = 8, then find the value of b + (1/b).
- If x² - 2x + 1 = 0, then find the value of (x² + x⁻²)(x² + x⁻²).
- If a 3 + b 3 + c 3 = 62, abc = -6 and (a + b + c) = 5, then what is the value of ab + bc + ac?
- If (360 – 335 + 205) ÷ 10 + √1600 = x, then {(x/2) + 8} = ?
