A single slit is illuminated at normal incidence with a parallel ...

[jerry coleman]

A single slit is illuminated at normal incidence with a parallel beam of light having a wavelength of 411 nm. The entire central band of the diffraction pattern is observed at 90.
 
  The illumination is now replaced by a nonrelativistic beam of electrons, each having a kinetic energy of 980 eV. When this beam hits the slit at normal incidence, at what angle will the first minimum of the electron diffraction pattern occur? (h = 6.626  10-34 J  s, mel = 9.11  10-31 kg, 1 eV = 1.60  10-19 J) A) 0.095 mrad
  B) 0.071 mrad
  C) 0.046 mrad
  D) 0.12 mrad
  E) 0.14 mrad

Question 2

Which of the following countries produces the most carbon from fossil fuels, per person?
 
  A) China
  B) Japan
  C) Western Europe
  D) United States
  E) former Soviet Union

[lindahyatt42]

Answer to Question 1

A

Answer to Question 2

D

[jerry coleman]

Thanks

[lindahyatt42]

Welcome