Physics
If a barometric reading is falling, this usually indicates what

No pressure
None
Decreasing pressure
Increasing pressure

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Physics
Why does the sea appear blue in colour?

Reflection of the sun light from water surface
Refraction of the sun light
Scattering of the sunlight by water molecules
Interference of the sun light from water surface

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Physics
Which one of the following is not a property of electromagnetic waves?

Electromagnetic waves do not show interference and diffraction.
Oscillating electric field and magnetic field are perpendicular to each other.
Electromagnetic waves are transverse waves
Electromagnetic waves do not require a medium to propagate.

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