What Do We Mean When We Say That Two Light

question 79

Multiple Choice

What do we mean when we say that two light rays striking a screen are in phase with each other?

• A)When the electric field due to one is a maximum,the electric field due to the other is also a maximum,and this relation is maintained as time passes.
• B)They are traveling at the same speed.
• C)They have the same wavelength.
• D)They alternately reinforce and cancel each other.

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