WAEC Physics 2023 Objective — Question 43
Question 43 of 50 from the West African Examinations Council (WAEC) Physics 2023 Objective paper, with the correct answer and a full explanation.
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The range of wavelengths of the infra-red waves in an electromagnetic spectrum is 10⁻³ m to 10⁻⁶ m. Which of the following statements about the wavelength of the radiation is not correct? The wavelength is
- A. equal to 10⁻³ m
- B. longer than 10³ m
- C. shorter than 10⁻⁶ mCorrect
- D. longer than 10⁻⁶ m
Explanation
Since infrared waves range from 10⁻³m to 10⁻⁶m, stating the wavelength is shorter than 10⁻⁶m is incorrect since the range extends only up to that value, not below it.
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