Beaufort Scale is used to determine
Strength of winds
Beaufort Scale: Understanding Wind Strength Measurement
The Beaufort Scale is a crucial tool used in meteorology and maritime activities. It provides a way to estimate wind speed based on observed conditions at sea or on land.
Purpose of the Beaufort Scale
The primary purpose of the Beaufort Scale is to determine the strength of winds. It was devised in the early 19th century by Admiral Sir Francis Beaufort of the British Royal Navy.
- The scale categorizes wind strength into 13 different levels, numbered from 0 (calm) to 12 (hurricane).
- Each level is described by a specific range of wind speeds (e.g., knots, mph, or km/h).
- Crucially, each level is also associated with a set of observable effects on the sea (like wave height and sea spray) and on land (like the movement of trees and flags). This observational aspect makes it very practical for sailors and observers without wind-measuring instruments.
Analyzing Other Options
Let's look at why the other options are not the primary function of the Beaufort Scale:
- Direction of winds: While wind direction is important in meteorology, the Beaufort Scale itself is not designed to measure or indicate direction. Special instruments like wind vanes are used for this.
- Height of aircrafts: The Beaufort Scale has no relation to determining the height of aircraft. Altitude is measured using altimeters.
- None of these: Since the scale is specifically designed to determine wind strength, this option is incorrect.
Beaufort Scale and Wind Strength
The Beaufort Scale links descriptive terms (like 'Light Air', 'Strong Breeze', 'Gale', 'Hurricane') to specific wind speed ranges and visual observations. For instance:
- Force 3 (Gentle Breeze): A speed of 7-10 knots (13-18 km/h). Effects include leaves and small twigs moving constantly; flags extend; light flags may snap.
- Force 7 (Near Gale): A speed of 34-40 knots (63-74 km/h). Effects include whole trees in motion; inconvenience is felt when walking against the wind.
Therefore, the Beaufort Scale is fundamentally a measure of wind strength, estimated through observation.
Important Questions from Miscellaneous
A stone is thrown horizontally from the top of a 20 m high building with a speed of 12 m/s. It hits the ground at a distance R from the building. Taking g = 10 m/s2 and neglecting air resistance will give :
A mass is attached to a spring that hangs vertically. The extension produced in the spring is 6 cm on Earth. The acceleration due to gravity on the surface of the Moon is one-sixth of its value on the surface of the Earth. The extension of the spring on the Moon would be:
Directions: Each item in this section consists of a sentence with an underlined word followed by four words (a), (b), (c), and (d). Select the option that is opposite in meaning to the underlined word and mark your response in your Answer Sheet accordingly.
The deluge affected the population.The major source of vitamins and minerals for vegetarians is
Which of the following statements about the Deccan Riots Commission is/are correct?
1. The Commission did not hold enquiries in the districts which were not affected.
2. The Commission did record the statements of ryots, sahukars and eye-witnesses.
Select the correct answer using the code given below:
