Question

What does the term point to correspondence in the paragraph refer to ?

• A. Waves having constant amplitude
• B. Waves having constant phase relation
• C. Waves having same frequency
• D. Wave having same amplitude,frequency and constant phase relation

Answer 1

The correct option is B Waves having constant phase relation

Broad sources may be treated to be a collection of many point sources. These sources have a constant phase relation, that is, the light from any two points picked up form the collection have a constant phase difference. This phase difference would exist even in reflected as well as transmitted wave, even when frequency might change.