Which one of the following statements with regard to ultra violet light is NOT correct?
It is a longitudinal wave.
Let's analyze the properties of ultra violet (UV) light and determine which of the given statements is NOT correct. Ultra violet light is a part of the electromagnetic spectrum, just like visible light, radio waves, X-rays, etc.
Electromagnetic waves share several fundamental properties:
Now let's look at each statement provided about ultra violet light:
Based on the analysis, the statement that is NOT correct with regard to ultra violet light is "It is a longitudinal wave."
| Property | Transverse Wave | Longitudinal Wave |
|---|---|---|
| Oscillation Direction | Perpendicular to wave direction | Parallel to wave direction |
| Examples | Light waves (including UV), waves on a string, water waves | Sound waves, waves on a Slinky (compression/expansion) |
| Medium Required? | Some (e.g., string, water); Electromagnetic waves (like UV) require NO medium (travel through vacuum) | Yes (solid, liquid, or gas) |
Since ultra violet light is an electromagnetic wave, it behaves as a transverse wave.
| Property | Description | Correct/Incorrect for UV? |
|---|---|---|
| Electromagnetic Wave | Part of the spectrum (radio, micro, IR, visible, UV, X-ray, gamma) | Correct |
| Travels through Vacuum | Does not need a medium | Correct |
| Wave Type | Transverse vs. Longitudinal | UV is Transverse (Statement says Longitudinal) |
| Wavelength vs. Visible Light | Wavelength range compared to visible light (\(\sim 400-700\) nm) | Shorter wavelength than visible light |
The electromagnetic spectrum is the range of all types of electromagnetic radiation. Energy, wavelength, and frequency are related:
The order of the spectrum from longest wavelength (lowest frequency/energy) to shortest wavelength (highest frequency/energy) is typically:
Ultra violet light has wavelengths roughly between 10 nm and 400 nm, which is shorter than the wavelengths of visible light (about 400 nm to 700 nm).
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