Light from a helium-neon laser (? = 632.8 nm) is incident upon a 0.200-mm wide slit. Find the total width of the central maximum 2.00 m from the slit
1.27 cm
Physics & Space Science
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Which of the following explains why the Moon rises in the east and sets in the west?
A) Earth rotates once each day. B) Earth orbits the Sun once each year. C) The direction of Earth's axis in space precesses with a period of about 26,000 years. D) Stars appear to move randomly relative to our Sun in the local solar neighborhood. E) The universe is expanding.
Physics & Space Science
What role do molecules play in spectral classification?
What will be an ideal response?
Physics & Space Science
What is the frequency of the wave?
A. 80 Hz
B. 50 Hz
C. 120 Hz
D. 140 Hz
E. 160 Hz
Physics & Space Science
Clusters of galaxy clusters are known as _____
A) megaclusters B) hyperclusters C) monoclusters D) superclusters
Physics & Space Science