Physics
Indicate the correct arrangement for electromagnetic radiation in order of their increasing wavelength.

X -rays, visible, infrared, microwave
X - rays, infrared, visible, microwave
Microwave, infrared, visible. X-rays
Visible, infrared, microwave, X-rays

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Physics
When a piece of pure silicon is doped with aluminium, then

The doped silicon piece will become p-type
The doped silicon piece will become n-type
The resistivity of the doped silicon piece will increase
The conductivity of the doped silicon piece will remain the same

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