Question

In direct vision spectroscope one uses
A. interface without deviation
B. deviation without interference
C. dispersion without deviation
D. deviation without dispersion

Answer 1

An optical spectrometer (sometimes referred to as a spectrophotometer, spectrograph, or spectroscope) is a device that measures light characteristics throughout a specified region of the electromagnetic spectrum, and is commonly used in spectroscopic examination to identify materials.

Complete answer:
The light intensity is usually the variable monitored, although it may alternatively be the polarisation state. The wavelength of light or a unit directly proportional to photon energy, such as reciprocal centimetres or electron volts, which has a reciprocal connection to wavelength, is generally the independent variable.

In spectroscopy, a spectrometer is used to generate spectral lines and measure their wavelengths and intensities. Spectrometers can also work with non-optical wavelengths including gamma rays and X-rays all the way to the far infrared. A spectrophotometer is a device that measures the spectrum in absolute values rather than relative units.

Spectrophotometers are most commonly employed in spectral areas around the visible spectrum. The idea of dispersion without deviation is used to build a direct vision spectroscope. It is a spectroscope that consists of a single tube with a series of prisms; one end of the tube is placed as close to the substance to be examined as possible, with the observer's eye at the opposite end; it can be used to perform a spectroscopic examination of blood in vivo, such as in the ear lobe or web of the thumb.

A direct vision spectroscope is used to examine the spectrum makeup of white light, radiant substances, and other objects quantitatively. The spectroscope is meant to allow people to view a divided spectrum of light that has been dissected by an optical device. The spectral superposition achieved using the spectroscope's graded scale. As a result, spectroscope light experiences both dispersion and deviation in direct vision.

Hence option C is correct.

Note: Because of the many approaches used to measure different sections of the spectrum, any one instrument will only function across a tiny percentage of this entire range. The spectrum analyzer is a similarly comparable electrical instrument that operates below optical frequencies (that is, microwave and radio frequencies).