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Q: Which instrument is used for photographing the Sun?
  • A. Galvanometer
  • B. Potentiometer
  • C. Spectrophotometer
  • D. Spectroheliograph
Correct Answer: Option D - The spectroheliograph is an instrument used in astronomy which captures a photographic image of the Sun at a single wavelength of light, a monochromatic image. The wavelength is usually chosen to coincide with an spectral wavelength of one of the chemical elements present in the Sun. It was developed independently by George Ellery Hale and Henri-Alexandre Deslandres in the 1891 at Horward and further refined in 1932 by Robert R. McMath to take motion pictures. Later in 1962, laser heliography was also developed.
D. The spectroheliograph is an instrument used in astronomy which captures a photographic image of the Sun at a single wavelength of light, a monochromatic image. The wavelength is usually chosen to coincide with an spectral wavelength of one of the chemical elements present in the Sun. It was developed independently by George Ellery Hale and Henri-Alexandre Deslandres in the 1891 at Horward and further refined in 1932 by Robert R. McMath to take motion pictures. Later in 1962, laser heliography was also developed.

Explanations:

The spectroheliograph is an instrument used in astronomy which captures a photographic image of the Sun at a single wavelength of light, a monochromatic image. The wavelength is usually chosen to coincide with an spectral wavelength of one of the chemical elements present in the Sun. It was developed independently by George Ellery Hale and Henri-Alexandre Deslandres in the 1891 at Horward and further refined in 1932 by Robert R. McMath to take motion pictures. Later in 1962, laser heliography was also developed.