At what point do the weak nuclear and electromagnetic forces ...

[lracut11]

At what point do the weak nuclear and electromagnetic forces split?
 
  A) never, they are still united
  B) at 1012 K, when pair production starts for neutrons and protons
  C) at 10-43 seconds, when all four forces separate as the Planck Era ends
  D) at about four seconds, when at millions of degrees hydrogen forms helium
  E) after about 10-10 seconds, when the temperature drops below 10-15 K

Question 2

What is meant by the wavelength of light? By its frequency? Explain how they are related to each other.
 
  What will be an ideal response?

[Dinolord]

Answer to Question 1

E

Answer to Question 2

The wavelength is the distance between successive wave crests, while the frequency is the number of waves that pass the observer per second. All forms of EM radiation travel in a vacuum at 300,000 km/sec., and this velocity is the product of the wavelength X the frequency of the radiation.

[lracut11]

TYSM

[at]

YES! Correct, THANKS for helping me on my review