Question

In a spectrometer , the focal length of a convex lens is equal to the length of its:​

Answer 1

Explanation:

A variable focal length deformable mirror has an inner ring and an outer ring that simply support and push axially on opposite sides of a mirror plate. The resulting variable clamping force deforms the mirror plate to provide a parabolic mirror shape. The rings are parallel planar sections of a single paraboloid and can provide an on-axis focus, if the rings are circular, or an off-axis focus, if the rings are elliptical.

Answer 2

Answer:

The spectrometer focal length is the distance between the focusing mirror and the detector. The spectral resolution increases with spectrometer focal length. Typical benchtop Raman systems have a 200–250 mm focal length, which maintains the instrument's compactness while providing standard resolution.

Explanation:

• Any device used to investigate a characteristic of light as a function of its region of the electromagnetic spectrum, often its wavelength, frequency, or energy, is referred to as a spectrometer. The characteristic being measured is often light intensity, though other factors like polarisation can also be done.
• Spectrometers are made up of a concave diffraction grating and a diffractive lens. Many spectrometers and monochromators employ the concave diffraction grating. One does not require a collimator or camera because it possesses both dispersion and focusing qualities.

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