Which of the following does not characterise X-rays?

Options

A. (a) The radiation can ionise the gas
B. (b) It causes fluorescence effect on Zns
C. (c) It is deflected by electric and magnetic fields
D. (d) Its wavelength is shorter than ultraviolet rays

Answer

To solve the question "Which of the following does not characterize X-rays?", we need to evaluate each of the provided statements regarding X-rays.

### Step-by-Step Solution:

1. **Evaluate Statement 1: "The radiation can ionize the gas."**
- X-rays are high-energy electromagnetic radiation that can indeed ionize gases. This occurs because the photons in X-rays have enough energy to remove electrons from atoms, leading to ionization.
- **Conclusion:** This statement is **correct**.

2. **Evaluate Statement 2: "It causes fluorescence effect on ZnS."**
- X-rays can cause certain materials, such as zinc sulfide (ZnS), to fluoresce. This is due to the energy from the X-rays exciting the electrons in the ZnS, causing them to emit light.
- **Conclusion:** This statement is **correct**.

3. **Evaluate Statement 3: "It is deflected by electric and magnetic fields."**
- X-rays are neutral particles and do not carry any charge. Because of this neutrality, they are not affected by electric or magnetic fields and therefore cannot be deflected by them.
- **Conclusion:** This statement is **incorrect**.

4. **Evaluate Statement 4: "Its wavelength is shorter than UV rays."**
- The wavelength of X-rays is indeed shorter than that of ultraviolet (UV) rays. X-rays typically have wavelengths in the range of 0.01 to 10 nanometers, while UV rays have wavelengths from about 10 to 400 nanometers.
- **Conclusion:** This statement is **correct**.

### Final Answer:
The statement that does not characterize X-rays is: **"It is deflected by electric and magnetic fields."** (Statement 3)

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