What is the wavelength of a photon having energy 2.00 eV? (c = ...

[casperchen82]

What is the wavelength of a photon having energy 2.00 eV? (c = 3.00  108 m/s, h = 6.626  10-34 J  s, 1 eV = 1.60  10-19 J)
 
  What will be an ideal response?

Question 2

A +3.0-C point charge is initially extremely far from a positive point charge Q. You find that it takes 41 J of work to bring the +3.0-C charge to the point x = 3.0 mm, y = 0.0 mm and the point charge Q to the point x = -3.0 mm, y = 0.00 mm.
 
  What is Q? (k = ) A) 55 nC
  B) 9.1 C
  C) 4.6 C
  D) 27 pC

[onowka]

Answer to Question 1

621 nm

Answer to Question 2

B

[casperchen82]

Thanks for the timely response, appreciate it

[bimper21]

Gracias!