1. Tardigrade
  2. Question
  3. Physics
  4. Which of the following statement is/are correct for coherent sources? I. Two coherent sources emit light waves of same wavelength. II. Two coherent sources emit light waves of same frequency. III. Two coherent sources have zero or constant initial phase difference with respect to time. Choose the correct option from the codes given below.

Q. Which of the following statement is/are correct for coherent sources?
I. Two coherent sources emit light waves of same wavelength.
II. Two coherent sources emit light waves of same frequency.
III. Two coherent sources have zero or constant initial phase difference with respect to time.
Choose the correct option from the codes given below.

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Solution:

Light sources which emit light waves of same wavelength (or frequency) having either zero or a constant originating phase difference are called coherent sources of light.