The primary mechanism for the absorption of infrared radiation is by excitation of:

(a) The core atom electrons
(b) Atomic vibrations
(c) The nucleus
(d) Valence-band electrons


(b) Atomic vibrations

Physics & Space Science

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The prefix yotta (Y) signifies a multiple of 1024. How many yottameters are there in a gigameter?

What will be an ideal response?

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An ideal air-filled parallel-plate capacitor consists of plates that are 1.0 mm apart and have an area of 1.5 × 10-4 m2

The capacitor is connected to a 12-V potential source (battery). (?0 = 8.85 × 10-12 C2/N ? m2) (a) What is the capacitance of this capacitor? (b) How much charge is on each of its plates? (c) What is the strength of the electric field between the plates?

Physics & Space Science