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Interpretation: For the given change in
Concept Introduction: The wavelength of light is defined as the distance between the successive peaks of the wave of light. The frequency of a wave is defined as the number of peaks passing a point in one second.
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Answer to Problem 4STP
The correct option is (C).
Explanation of Solution
Reason for correct option:
The relation between wavelength and energy of light is as follows:
Here, h is Planck’s constant, c is the
The above equation can be rewritten as follows:
Thus, the wavelength is inversely proportional to the energy. As wavelength increases, the energy of light decreases.
Therefore, option (C) is correct.
Reason for incorrect options:
The correct relation between wavelength, frequency, and speed of the light is as follows:
Here,
In this relation, the speed of light is a constant; thus, it remains the same. The above formula can be rewritten as follows:
From the relation, the wavelength is inversely proportional to the frequency of light. Thus, if the wavelength of light increases, the frequency of light decreases.
Therefore, options (A) and (B) are incorrect.
Also, intensity and energy are directly proportional; thus, it is also inversely proportional to wavelength. Thus, as wavelength increases, the intensity of light decreases.
Therefore, option (D) is incorrect.
Chapter 5 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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