fayltrik 
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December 09, 2010
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Helium-Neon Laser Emits wavelength of 632.8 nm. Consists of a mixture of ~90% Helium gas, ~10% Neon gas The gases are enclosed in a glass tube. An electrical discharge is established along the bore of the tube Two mirrors are bonded to the ends of the discharge tube, one a total reflector, the other having ~1 % transmission Information you need for the next part: A … 
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Measurement: Random errors are errors of measurements in which the measured quantities differ from the mean value with different magnitudes and directions. Systematic errors are errors of measurements in which the measured quantities are displaced from the true value by fixed magnitude and in the same direction. Accuracy is a measure of how close the results of an …
G-M Tube Makes use of the ionising ability of the three types of radiation to detect them Consists of a metal tube(cathode) sealed with argon gas and bromine vapour at about 1/10 of the atmospheric pressure. Anode is the rod lying along the axis of the tube. Steps to detecting ionising radiation A potential difference of about 400V to 500V is applied between the cathode … Last 5 Pings
Rotation of object relative to FIXED axis: Basic equations you can get by looking at the diagram above: $x_{1} = r \cos {\alpha} $ $x_{2} = r \cos {(\theta + \alpha)} $ $ y_{1} = …
An electric circuit is a collection of electrical devices, called circuit elements connected by conductors in a closed path (i.e., in a complete loop). Circuit elements include, source of electrical energy (e.g. battery), sink of electrical energy (e.g. light bulb), and switch to complete or break the circuit. Conductors (e.g., copper wires) are then used to connect them …
A direct current (DC) is a flow of charges around a circuit in the same direction all the time. - Batteries supply DC and most appliances need DC to function. Alternating current (AC) is a flow of charges around a circuit that reverses its direction at regular intervals, usually many times a second. - Household electrical power is supplied in the form of AC which …
Sub-Topics: Direct and alternating current Back To Secondary School Physics Notes
Boyle’s Law states that the volume of a fixed mass of gas at constant temperature is inversely proportional to the pressure applied to the gas. $$pV = constant$$ $$p_{1}V_{1} = p_{2}V_{2}$$ where $p_{1}$ = initial pressure $V_{1}$ = initial volume $p_{2}$ = final pressure $V_{2}$ = final volume Back To Pressure
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