English Hindi



Prelims bits

Prelims Capsule

Science & Technology

What Is Spectroscopy ?

What Is Spectroscopy ?

Tag:GS3 || Science and Technology || Space || Miscellaneous

Why in news?

  • The Indian Space Research Organisation (ISRO) released an image from Chandrayaan-2 showing measurements from the Moon, carried out by the instrument Imaging Infrared Spectrometer (IIRS).
  • Such studies make up a branch of physics called spectroscopy.

Details :

  • It is well known how visible light can disperse into rainbow colours after passing through a prism.
  • The science of spectroscopy grew from there, and today it has extended to include the study of interaction between matter and electromagnetic radiation.
  • IIRS is designed to measure light from the lunar surface in narrow spectral channels (bands).
  • It has the ability to split and disperse reflected sunlight (and its emitted component) into these spectral bands.

 What is spectroscopy?

  • Spectroscopy is the study of the interaction between matter and electromagnetic radiation.
  • Electromagnetic radiation, which includes light, has characteristics of waves and particles. Each “particle” of light, or ” photon ,” has a discrete amount of energy that can be transferred to a molecule.

Significance :

  • From the reflected solar spectrum, scientists will look for signatures, including of minerals.
  • This will help map the lunar surface composition, which in turn will help us understand the Moon’s origin and evolution in a geologic context.