Beyond the scale of superclusters, galaxies are randomly distributed throughout the universe
Indicate whether the statement is true or false
FALSE
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In a double slit experiment, a beam of electrons strikes a pair of slits. The slits are 15 ?m apart, and the first interference maximum lies at an angle of 0.50 µrad from the center of the interference pattern
What is the momentum of the incoming electrons? (h = 6.626 × 10-34 J ? s, mel = 9.11 × 10-31 kg) A) 4.4 × 10-23 kg ? m/s B) 2.2 × 10-23 kg ? m/s C) 1.1 × 10-23 kg ? m/s D) 6.6 × 10-23 kg ? m/s E) 8.8 × 10-23 kg ? m/s
The dark age started as the first stars began to form
Indicate whether the statement is true or false
When waves interfere, the result is ________ original waves ("they interfere")
A) always smaller than B) always larger than C) always the same as D) sometimes smaller than, sometimes larger than
Why are molecular lines usually found in infrared and radio regions, not as visible lines?
What will be an ideal response?