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Units And Measurement

Question

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What is parallax?

Solution

Parallax is the difference or displacement in the apparent position of the object viewed along two different lines of sight. Parallax is measured by the angle or semi-angle of inclination between these two lines.

Some More Questions From Units and Measurement Chapter

What is measurement?

What is the need of measurement?

Define physical quantity.

Give four examples of physical quantities.

Define unit.

What are the two main required characteristics of a unit?

Can we use same units for different physical quantities?

Can we use different units to measure same physical quantity?

To measure a physical quantity X, the unit U is repeatedly used for n times. What is the magnitude of physical quantity?

Does the numerical factor in the quantitative measurement depend on the system of unit used?

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