Blue
I am not sure but I believe the reason is that the light source used in the past (and still is) was a tungsten lamp which has its max intensity at ~600nm. Yoram
600nm is 0.00006 cm
PMS 356
See if this linked page helps.
No, the wavelength determines the color of the light. 700nm corresponds to red, 400nm to about purple, and in between are the rest of the visible colours.
Tripple-word quares are coloured red.
Red
Using a UI indicator solution, or UI paper, pH 6.7 corresponds to a yellow/green colour
It's the X-chromosome, so whichever number corresponds to it.
corresponds in Tagalog: katumbas
It's the (speed of the wave)/(600 nm) If it happens to be an electromagnetic wave in free space, then the frequency is about 500,000 Gigahertz.