Twinstar Inc. Interview Questions and Answers

UV spectroscopy is a technique used to analyze the absorption and transmission of ultraviolet light by a sample.

• UV spectroscopy involves measuring the absorbance of ultraviolet light by a sample.

• It works based on the principle that molecules absorb UV light at specific wavelengths.

• The amount of absorption is proportional to the concentration of the absorbing species in the sample.

• UV spectroscopy is commonly used in pharmaceutical, environmental, and biochemical analysis.

UV spectroscopy measures the absorption of ultraviolet (UV) light by a sample.

• UV spectroscopy is used to analyze the electronic transitions in molecules.

• It is commonly used in pharmaceuticals, environmental monitoring, and material science.

• UV spectroscopy typically ranges from 190 to 400 nm.

• The Beer-Lambert law is often applied in UV spectroscopy to quantify the concentration of a sample.

• UV spectroscopy can be used to determine the purity of a substance by measuring its absor...read more

Fingerprint region refers to a specific range of frequencies in an infrared spectrum that is unique to a particular molecule.

• Fingerprint region is typically between 1500-500 cm^-1 in an IR spectrum.

• It is used for identifying functional groups in organic molecules.

• Each molecule has a unique fingerprint region due to its unique molecular structure.

pH is a measure of the acidity or alkalinity of a solution on a scale of 0 to 14.

• pH stands for 'potential of Hydrogen'

• It measures the concentration of hydrogen ions in a solution

• A pH of 7 is considered neutral, below 7 is acidic, and above 7 is alkaline

• Examples: Lemon juice has a pH of around 2, while baking soda has a pH of around 9

UV stands for ultraviolet, a type of electromagnetic radiation with a wavelength shorter than that of visible light.

• UV radiation is commonly emitted by the sun and can cause damage to skin and eyes.

• UV radiation is categorized into UVA, UVB, and UVC based on wavelength.

• UV light is used in various applications such as sterilization, tanning beds, and counterfeit detection.