Answer:
3. Has no moons
2. One of the rocky planets
1. The moon has no atmosphere.
Explanation:
Mars moons [2]: Deimos, Phobos; Jupiter is considered a <em>Jovian</em><em> </em><em>[</em><em>Gas</em><em> </em><em>Giant</em><em>]</em><em> </em><em>planet</em><em>;</em><em> </em>our moon has a very thin atmosphere.
<span>Nodes are points along the medium that appear to be standing still. They are points on a standing wave that has no displacement from the rest position.
Antinodes are the opposite of nodes. Those are</span> points that undergo the maximum displacement.
<span>At the nodes the destructive interference occurs</span> . For example <span>a crest of one wave meets a trough of a second wave</span> , or a half-crest of one wave meets a half-trough of a second wave...
C
The wavelength of the light produced by the laser is determined by the Composition of the active medium
Explanation:
As stipulated by Bohr's theory, different atoms have different and unique absorption and emission spectra that can also be used to identify them. The electrons of the atoms when excited (the enter an inversion state), using specific photons of electromagnetic waves, they move up energy levels. When the electrons move back to their ground state, they release the same wavelength of photons. The photos then excite other atoms and the amplification continues. Therefore the lasing medium is the main determinant of the wavelength of the laser beam.
For example, the use of argon fluoride as an active medium produces lasers of 193 nm in wavelength and the use of nitrogen produces laser of
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Gravity - is the universal force that is effective over the longest distance.
