Which of the following scales is/are not linear in nature?(i) Decibel(ii) Richter(iii) Meter

The scales that are not linear in nature among the given options are:

(i) Decibel: The decibel scale is a logarithmic scale used to measure sound intensity. It is not linear because each increment of 10 represents a tenfold increase in intensity.

(ii) Richter: The Richter scale is also a logarithmic scale used to measure the energy released by earthquakes. It is not linear because each whole number increase on the scale represents a tenfold increase in measured amplitude and roughly 31.6 times more energy release.

(iii) Meter: The meter scale is a linear scale used to measure length or distance. It is linear because each increment represents a constant difference in length.