Explain what is Parallax and Distance Measurement?
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13) Explain what is Uncertainty principle?
Uncertainty principle tells that the momentum and position of a particle cannot be measured precisely.
14) Explain what is dark matter?
Dark matter is an invisible matter in the space that can hold the stars into the galaxy. They have no effect of electromagnetic force on it, which means it does absorb, reflect or emit light that makes them practically invisible.
15) Explain what is a photon under the photon theory of light?
) Explain the term angular acceleration?
Angular acceleration is the rate of change of angular velocity or speed of a body moving along a circular path.
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- Astronomers use an effect called parallax to measure distances to nearby stars. Parallax is the apparent displacement of an object because of a change in the observer's point of view.
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