Which of the following is the most similar, in its operation, to ...

[Lisaclaire]

Which of the following is the most similar, in its operation, to a photovoltaic cell?
 
  A) fluorescent light bulb
  B) geothermal energy
  C) fossil-fuel electric power plant
  D) battery
  E) automobile engine

Question 2

If an x-ray beam of wavelength 1.4  10-10 m makes an angle of 20 with a set of planes in a crystal causing first order constructive interference, at what angle will the second order line appear?
 
  A) 40
  B) 20
  C) 43
  D) 4.0
  E) 11

[chinwesucks]

Answer to Question 1

D

Answer to Question 2

C

[Lisaclaire]

Thanks for the timely response, appreciate it

[amandalm]

Gracias!