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General Knowledge TNPSC, UPSC Exams

  • Laundry whitening agents contain small quantities of a certain substance which fluoresces with a bluish white light when ultra-violet rays fall on them. This enhances the whiteness of clothes.
  • Rayleigh’s scattering law states that the amount of scattering of light is inversely proportional to the fourth power of its wavelength.
  • The colour of the sea The blue colour of the sea is partly due to reflection from the blue sky and partly by scattering of light by the water molecules. Near the shore the sea is green because of the sand in suspension which scatters blue and green light and also due to the reflection of yellow light from the sand.
  • The FM radio uses electromagnetic waves of frequency ranging from 88 MHz to 108 MHz.
  • The AM radio uses electromagnetic waves of frequency ranging from 550 kHz to 1000 kHz


  1. Sleeping airbeds nz may be either self-inflating or inflated with air or closed-cell foam. Since you won't have to worry about carrying it around, a more extensive cushion or mattress may be enjoyed for comfort when automobile camping. Weight is critical while hiking, so a compact air pad or closed-cell cushion may be the best option.

  2. Take your application paperwork and money to a nearby passport expedition office if you need your speedy Rush passport in less than two weeks. Tickets may sometimes be processed and delivered within 24 hours, although the typical processing period is two weeks. If you need your tickets quickly, there must be more than the access and expediting price to cover the cost.



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