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Frequency
The number of vibration done per second by an oscillation body is known its frequency. It is denoted by V. The S.I unit is Hz.
V=1/T
what are electromagnetids
The velocity with which the group of waves travels is called as group velocity or the velocity with which a ray packet goes is called as group velocity
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A thin convex lens of focal length 0.1m and a thin concave lens of focal length 0.1m are placed co-axially in contact. What is the total power of the combination?
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