Question

The frequency order of for \(γ-rays\ (b), X–rays\ (a), UV–rays\ (c)\):

• A. \(b>a>c\)
• B. \(a>b>c\)
• C. \(c>b>a\)
• D. \(a>c>b\)

Answer 1

The Correct Option is A

The question tests your understanding of the electromagnetic spectrum, specifically the order of frequencies for different types of electromagnetic radiation.

The electromagnetic spectrum is typically arranged based on the frequency (or equivalently, wavelength) of the waves. Below is a brief explanation of the relevant parts of the spectrum covered by the question:

• Gamma rays (\(γ\)-rays): These have the highest frequencies and, therefore, the shortest wavelengths. They are produced in nuclear reactions and are very penetrating.
• X-rays: These have frequencies just lower than gamma rays. They are commonly used in medical imaging.
• Ultraviolet (UV) rays: These have lower frequencies than X-rays. They are emitted by the sun and can cause skin tanning as well as sunburn.

The frequency order, from highest to lowest, would be gamma rays (\(γ\)), then X-rays, followed by ultraviolet (UV) rays. Thus, in terms of the variables given in the question, the order is:

b>a>c

Let's analyze the options with this understanding:

1. b>a>c: Correct. Gamma rays have higher frequencies than X-rays, which have higher frequencies than UV rays.
2. a>b>c: Incorrect. This would imply X-rays have higher frequencies than gamma rays, which is not true.
3. c>b>a: Incorrect. This places UV rays with the highest frequency, which is incorrect.
4. a>c>b: Incorrect. This suggests that X-rays are highest, followed by UV rays and then gamma rays, which is not the correct order.

Thus, the correct answer is b>a>c.