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

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

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Physics
Two identical solid pieces, one of gold and other of silver, when immersed completely in water exhibit equal weights. When weighed in air (given that density of gold is greater than that of silver)

Weighing will depend on their masses
The gold piece will weigh more
The silver piece will weigh more
Both silver and gold pieces weigh equal

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Physics
Rainbow is due to

refraction and reflection of sunlight by water droplets
diffusion of sunlight through water droplets
absorption of sunlight in minute water droplets
ionisation of water deposits

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