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
The absorption of light energy by pigment molecules in the light-harvesting complex, and the path th
Emphysema. (a) Illustration comparing normal lungs and emphysemic lungs. The inserts illustrate how
Phases of the normal walking gait.
Cancerous cells versus normal cells
Some Single-Gene Defects for Which Genetic Tests
The obese (ob) mouse mutant, shown on the left (a normal mouse is on the right), has provided many c