Concept explainers
Which set of
a. 250 nm; 300 nm; 350 nm
b. 350 nm; 300 nm; 250 nm
c. 300 nm; 350 nm; 250 nm
d. 300 nm; 250 nm; 350 nm
Interpretation: The set of wavelengths for light arranged in the increasing order of frequency is to be identified.
Concept Introduction:
The distance between the two adjacent crests or troughs is called wavelength of light. It is represented by the symbol
The inverse of wavelength is called frequency. It is defined as the number of cycles or oscillations that pass through a fixed point in one second.
The wavelength of the light is inversely related to the frequency.
Answer to Problem 1SAQ
Correct answer:
The set wavelengths for light in increasing order of frequency can be arranged as follows:
Explanation of Solution
Reason for correct option:
The frequency and wavelength of light are inversely related. This can be represented as follows:
Here,
This implies that the shorter wavelength will have a higher frequency and longer wavelength will have a lower frequency.
Thus, the decreasing order of wavelengths of light represents the increasing order of frequency for the light. The order for the lights with respect to frequency is the reverse of the order for lights with respect to wavelengths. Hence, the correct set of wavelengths for the light representing the increasing order of frequency is
Hence, option (b) is correct.
Reasons for incorrect options:
Option (a) is incorrect because according to the above explanation, the set of wavelengths
Option (c) is incorrect because according to the above explanation, the set of wavelengths
Option (d) is incorrect because according to the explanation, the set of wavelengths
Hence, options (a), (c), and (d) are incorrect.
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