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Yogita Ingle 6 years, 5 months ago
A plane wavefront is a set of waves traveling in a plane . This is seen in lights coming from a infinite source.
A cylindrical wavefront comes from a horizontal slit opening like in diffraction ,etc
A spherical wavefront comes from a point source nearby like a burning candle
Wave fronts are the set of waves which have the same phase or state of vibration at a given time or locus of all points on a wave at the same constant phase
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Yogita Ingle 6 years, 5 months ago
A Standard Hydrogen Electrode (SHE) is an electrode that scientists use for reference on all half-cell potential reactions. The value of the standard electrode potential is zero, which forms the basis one needs to calculate cell potentials using different electrodes or different concentrations. SHE is composed of a 1.0 M H+(aq) solution containing a square piece of platinized platinum (connected to a platinum wire where electrons can be exchanged) inside a tube. During the reaction, hydrogen gas is then passed through the tube and into the solution causing the reaction:
2H+(aq) + 2e- <==> H2(g)
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Yogita Ingle 6 years, 5 months ago
For electrical network, Kirchhoff’s rules are as follows:
(i) Junction rule : At any junction, the sum of the currents entering the junction is equal to the sum of currents leaving the junction
∴ Σ I = 0
(ii) Loop rule: The algebraic sum of changes in potential around any closed loop involving resistors and cells in the loop is zero.
∴ Σ IR + Σ E = 0
According to Kirchhoff’s rule, I1 + I2 = I3
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Yogita Ingle 6 years, 5 months ago
- The surface that we choose for the application of Gauss’s law is called the Gaussian surface. The Gaussian surface can pass through a continuous charge distribution.
- Gaussian surface is a closed surface in three dimensional space through which the flux of a vector field is calculated; usually the gravitational field, the electric field, or magnetic field.
- The concept of Gaussian surface helps in evaluatig the electric field intensity due to symmetric charge distribution.
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Yogita Ingle 6 years, 5 months ago
Our planet contains many gases which form a surface layer and prevent unwanted radiations to reach the surface. These gases are in certain proportions breaking which, the components get disturbed. The greenhouse gas absorbs and emits these radiations within the range which ultimately causes the greenhouse effect. The common greenhouse gases found in Earth’s atmosphere are:
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