If two stars have a magnitude difference of 5, what is their flux ratio?
a. 10.0
b. 12.6
c. 100.0
d. 250.0
e. 625.3
c
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X-Ray Diffraction: A researcher is using x-rays to investigating a cubic crystal. He is looking at Bragg reflection from the planes parallel to the cube faces. He finds that when using x-rays with a wavelength of 0.165 nm, a strong first maximum occurs when the beam makes an angle of 23.5° with the planes. What is the spacing of adjacent atoms in this crystal?
Fill in the blank(s) with the appropriate word(s).
A grating with 396 lines/mm is illuminated with light of wavelength 343 nm. What is the angular separation between the two second-order bright fringes?
A) 31.5° B) 15.8° C) 32.9°
The thing that is different between x-rays and radio waves is
1) their charges, 2) their masses, 3) their frequencies, 4) the medium through which they travel, 5) the speeds at which they travel, and the thing that is the same for x-rays and radio waves is 6) their masses. 7) their frequencies. 8) the medium through which they travel. 9) the speeds at which they travel. 10) none of these.
Ideal Gas Law: A quantity of an ideal gas is kept in a rigid container of constant volume. If the gas is originally at a temperature of 19°C, at what temperature will the pressure of the gas double from its original value?
A. 91°C B. 38°C C. 311°C D. 273°C E. 122°C