Correct Answer - Option 3 : c) and d)
Wind speed and Related property damages are the basis of the 'Fujita Scale' for classifying tornadoes.
'Fujita Scale' for classifying tornadoes:
- In 1971, Dr. Theodore Fujita developed a method for categorizing tornadoes by looking at how much damage they cause and using this to estimate the wind speed.
- This system is called the F-Scale or Fujita Scale; it classifies tornadoes by their estimated wind speed, which is determined by looking at how strong the wind must have been to cause the resulting damage.
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Tornadoes are classified into five categories, F-0 through F-5. F-0 tornadoes are the mildest. F-5 tornadoes are the most dangerous (and the rarest).
- F-0 40-72 mph, Light damage, chimney damage, tree branches broken
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F-1 73-112 mph, Moderate damage, mobile homes pushed off foundation or flipped over
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F-2 113-157 mph, Considerable damage, mobile homes demolished, trees uprooted
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F-3 158-205 mph, Severe damage, roofs, and walls were torn down, trains overturned, cars thrown around
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F-4 207-260 mph, Devastating damage, well-constructed walls leveled
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F-5 261-318 mph, Violent damage, homes lifted off the foundation and carried considerable distances, autos thrown as far as 100 meters.
- It is not easy to measure wind speed in a tornado because a tornado usually destroys local measuring equipment, and tornadoes exist for a short time at random places and they are gone before meteorologists can study them.
