Question

In UV spectrophotometer, lamp used to generate UV spectrum is:

• A. Tungsten
• B. Sodium vapor
• C. LED
• D. Deuterium

Answer 1

The Correct Option is D

The question asks about the type of lamp used in a UV spectrophotometer for generating a UV spectrum. Let's explore the options and identify the correct one:

1. Tungsten: Tungsten lamps are predominantly used in visible spectrophotometry, as they emit light primarily in the visible region of the electromagnetic spectrum. They are not suitable for generating UV light because their emission in the UV range is insufficient.
2. Sodium vapor: Sodium vapor lamps are known for producing intense yellow light with narrow spectral lines around 589 nm, in the visible range. They are neither suited for UV nor commonly used in spectrophotometry.
3. LED: LEDs (Light Emitting Diodes) are generally used in visible light applications. Despite advancements that allow LEDs to emit at various wavelengths, they are not typically used as the primary source in UV spectrophotometers.
4. Deuterium: Deuterium lamps are the most commonly used light sources in UV spectrophotometers, covering the UV range of approximately 190 - 400 nm. They provide a continuous spectrum of UV light, essential for most analytical applications in UV spectroscopy.

Based on the explanations above, the correct lamp used in a UV spectrophotometer to generate a UV spectrum is the Deuterium lamp.

Thus, the correct answer is:

Deuterium