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What is a starry sky?
Probably one of the most beautiful lighting effects which can be created that can be very simple or rather sophisticated. In its simplest form, a starry sky consequence is made with a number of little diameter fibers coupled to a huge solid core, that delivers the light from the illuminator. It creates a number of static points of similar diameter that can be quite effective when a little flat.
More elaborate systems use some fiber calibres', 0,25mm to 3mm diameter and run directly to the illuminator. The numerous sizes of fiber make for various intensities on the point light, providing the effect of distance and perspective creating great depth. Coupled along with a twinkle effect wheel the effect can be rather stunning.
Schwarzschild radius The radius r of the event horizon for Schwarzschild black hole of mass m is provided through (in geometrized units) r = 2 m. In conventional units, r =
In the Compton effect, a photon of wavelength l collides with a stationary electron. The wavelength of the emitted photon is: a) longer than l b) shorter than l c)
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Simple 'spring' balance Punch four holes in an old tin lid with a nail, spacing them partially round the circumference. Pass pieces of string by these holes and tie them togeth
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What''s the main idea of the topic fluid mecanic???
A rocket weighs 9800N. What applied force gives it a vertical acceleration of 4m/sec/sec?
Feeling centrifugal force Tie a weight to a string about a metre in length and then whirl the weight around at arm's length. View the outward pull on the string. This is centri
Electrical measuring instruments: Quantities of electrical current, voltage and resistance are measured using instruments called meters. Until the advent of electronic displays
Inductors are used extensively in analogue circuits and signal processing. Inductor in conjunction with capacitors and other components form tuned circuits which can emphasize or f
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