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
Comparison of normal-shaped erythro- cytes and the abnormal sickle shape noted in patients with sick
Asthma. (a) A normal bronchiole. (b) An asthmatic bronchiole. During an asthma “attack,” the bronchi
Slit lamp examination.
Model for the events occurring around a single replication fork
Normal combustion is a smooth, controlled burning of the air–fuel mixture.
In the retina, there are two types of light receptor cells: Rods are sensitive to differences in lig