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Two waves of equal frequency have amplitudes 2 units and 3 units respectively. When they superpose coherently the intensity of the resultant wave is I1. The intensity becomes I2 when they superpose incoherently. Evaluate I1 / I2.
Cathode rays are made up of: (1) Positively charged particles (2) Negatively charged particles (3) Neutral particles (4) None of these Ans: (2)Negatively charged pa
A certain radioactive substance has a half-life of 40 minutes. How much of an original 100 grams substance will remain after 2 hours? solution) m= m0/2t/T m=100 gms.. t=2 hours
How is glass fibre material in optical fibres used? Glass fibre material in optical fibres: Silica is the generally used materials for the manufacture of a glass fibre. The
Relativistic Length Contraction The animations that were given below depict these phenomena of length contraction. In every animation a spaceship is moving past Earth at a high
The refractive index of glass is 1.54. Determine the polarizing angle when light goes from glass to air medium?
production and analysis of diffrent polarised light
The power factor of an a.c. circuit is 0.5. What will be the phase difference among voltage and current in this circuit?
Zehnder's balance This ingenious balance, which is very beneficial for demonstration experiments, can be constructed in a few minutes using pins, razor blade, cork and knitting
1 Farad: One farad is described as the capacity of that capacitor which keeps a charge of 1 coulumb, if the potential difference among the plates is one volt. It's equation
Q. For particles that have mass such like electrons quantum theory gives the relationship of wavelength to momentum by which of the following formulas, where h is Plancks constant,
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