87. The proper order from shortest to longest wavelength is:

By Admin / September 19, 2025

A. Visible, infrared, ultraviolet

B. Infrared, visible, ultraviolet

C. Ultraviolet, visible, infrared

D. Visible, ultraviolet, infrared

✅ The correct answer is option C.
The electromagnetic spectrum includes, from shortest wavelength to longest: Ultraviolet, visible, infrared.

84. The maintenance of relatively constant internal environment is called

90. BOD of a river water is found very high. This means water

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