Question

Why can be vernier callipers, screw gauge and Spherometer used in direct method ?

Answer 1

Answer:

The vernier calipers, screw gauge, and spherometer used in direct methods of measurement because they can measure the average lengths which range from few meters to 10^(-5) m. There are two methods of measurement- direct and indirect methods.

Answer 2

Use of vernier calipers, screw gauge, and measuring instrument utilized in direct methodology :

Explanation:

• A meter scale is employed for lengths from one millimeter to a hundred m.
• A vernier micrometer is employed for lengths to Associate in Nursing accuracy of zero.1 mm.
• A screw gauge and a spherometer will be wont to live lengths as little on zero.01 mm. to live lengths on the far side these ranges, we have a tendency to create use of some special indirect ways.
• For e.g. giant distances like the gap of a planet or a star from the planet can not be measured directly with a meter scale.
• Here, we have a tendency to use the optical phenomenon methodology.
• A measuring instrument is an instrument for the precise mensuration of the radius of a sphere. it's typically used for determinative the radius of curvature of hogged or intros mirrors and lenses.
• It can even be wont to live the thickness of sheet glass or the depth of depression in a very slide.

• The usual kind consists of a fine screw acquiring a nut carried on the center of a tiny low legged table or frame; the feet forming the vertices of an equiangular triangle.
• The lower finish of the screw and people of the table legs square measure finely tapered and terminate in hemispheres, so every rests on a degree.
• If the screw has 2 turns of the thread to the millimeter the top is sometimes divided into fifty equal components, so variations of zero.01 millimeter could also be measured while not employing a vernier.