Radiations are absorbed in_______________?
Correct answer: A. Spectrophotometer method
- A. Spectrophotometer method
- B. Dilatometric method
- C. Optical relation method
- D. Refractometric method
Explanation
A spectrophotometer measures how much radiation a substance absorbs at selected wavelengths, usually by comparing incident and transmitted intensities. Dilatometric and refractometric methods measure volume-related and refractive properties, not absorption directly. Students may choose d because refraction also involves light, but refraction is different from absorption.
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About Planck's Quantum Theory
Planck's quantum theory states that energy is emitted or absorbed in discrete packets called quanta, with each packet having energy E = hν. It covers the meaning of Planck's constant, the relationship between frequency and wavelength, and how quantisation differs from the classical continuous model of energy.
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