Answer:
critical angle is the angle of incidence in optically denser medium, for which the angle of reflection in the less denser medium is 90 degree
Explanation:
total internal reflection occurs at one particular angle of incidence where the reflected ray lies on the boundary.
this angle is called the critical angle
A boat is floating in a small pond. the boat then sinks so that it is completely submerged. what happens to the level of the pond?
It increases!
Alpha Centauri A is about 93 million miles away from the Earth and it takes light 4.367 years to reach there.
2 valence electrons
Explanation:
Electron configuration of nickel (Ni):
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁸
The valence electrons are in the electronic shell with the higher principal quantum number (n). In our case, nickel have 2 electrons in the 4s², with the n = 4.
Learn more about:
electrons in the valence level
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Answer:
wavelength.
Explanation:
One complete expression of a waveform beginning at a certain point, progressing through the zero line to the wave’s highest (crest) and lowest (trough) points, and returning to the same value as the starting point is called a is called wavelength. Its can be also defined as the distance between two successive crests or trough points in wave form.