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
Cervical cancer (a) Top view of the uterus showing the presence of a tumor in the wall of the cervix
Stereo Image taken by NASA STEREO Probes launched in 2006; utilizing two Spacecrafts to image the Su
Single blood cell
Fun with light refraction
Light beer has about the same amount of alcohol as regular beer
People who are color-blind see colors differently. (a) Those with normal vision see the red leaves.