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Chapter 17: Problem 61

Infrared radiation is detected by (A) Spectrometer (B) Pyrometer (C) Nanometer (D) Photometer

Short Answer

Expert verified
The correct instrument used to detect infrared radiation is \( \textbf{(B) Pyrometer} \) because it is specifically designed for detecting and measuring infrared radiation emitted by an object.

Step by step solution

01

Understanding infrared radiation

Infrared radiation is part of the electromagnetic spectrum and has a wavelength longer than visible light but shorter than microwave radiation. It is essential to know that these wavelengths are usually measured in micrometers (碌m). Infrared radiation is used in various applications such as thermal imaging, night vision, sensing, and remote control systems.
02

Analyzing the options

Let's discuss each of the given options to understand their usage and application: (A) A spectrometer is a scientific instrument used to measure the properties of light over a specific portion of the electromagnetic spectrum. It is typically used to analyze the wavelength distribution within a light source and determine the chemical composition of a sample. Although spectrometers can measure infrared radiation, they are not dedicated instruments for detecting infrared radiation. (B) A pyrometer is an instrument that measures high temperatures from a distance using the principle of detecting infrared radiation emitted by an object. Pyrometers are specifically designed for detecting and measuring the thermal radiation, including infrared radiation, emitted by an object. (C) A nanometer is not an instrument. It is a unit of measurement equal to one-billionth of a meter. Since this is not an instrument, it cannot be used to detect infrared radiation. (D) A photometer is a device used to measure the intensity of light. Although photometers can detect light across various regions of the electromagnetic spectrum, they are not specifically designed to detect infrared radiation.
03

Identifying the correct answer

Based on our analysis of the given options, we can conclude that the correct answer is (B) Pyrometer because it is the instrument specifically designed for detecting and measuring infrared radiation emitted by an object.

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