Last year’s nobel prize went to three people who developed blue leds in 1990’s. red and green led’s were developed much earlier but none of the developers of red or green leds have won the nobel prize. this is partly because you need all three colors, red, green and blue to create white light. however, this statement is not fully correct, considering that some of the white leds use only blue leds encapsulated by a phosphor coated bulb to generate white light. can you make white leds out of red or green leds by utilizing phosphors? explain.

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force