Explain what are wave fronts?
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What is Refraction ?
How spectral lines show discrete energy levels in an atom. : quantum physics
Why, when you release an inflated, untied balloon, does it fly across the room?
When a toy balloon is filled with air and then the air is allowed to go out, why dies the balloon whiz away ?
Why is the earth not used as a return wire in a telephone system, while it is dine so in case of telegraph system.
What are the branches of physics?
What is the use of rectifiers? Point out them one by one.
Why does a tea kettle sing?
Two parallel beams of electrons are moving in the same direction. Does they repel or attract each other?
Explain about Hydraulic brakes?
What seven colors appear to be white when mixed together?
How do fireworks turn into shapes like hearts and stars?