Question

when a theory needs modification?​

Answer 1

Answer:

Here is your Answer

Explanation:

That is the nature of science. It is about exploration not doctrine.

It is always seeking to make itself more accurate. Major theories are not modified often but may be subject to tweaks as we find new information or are exposed to new conditions.

The law of gravity for example is over 350 years old but only required adjustment by Einstein’s relativity for some conditions that Newton could not have foreseen.

Generally we use it exactly as Newton discovered it.

A theory is based on verifiable evidence and must be testable and falsifiable. it has to undergo ongoing peer review from experts in the field and is always subject to changes but it is rare these days for an established theory to have major revisions, unless it is in a relatively new area of discovery.