The Difference Between Lightwaves Approaching and Lightwaves Receding Is

question 42

Multiple Choice

The difference between lightwaves approaching and lightwaves receding is

• A)when approaching,lightwaves have higher frequency; when receding their frequency is lower.
• B)when approaching,lightwaves have lower frequency; when receding their frequency is higher.
• C)the frequency of approaching lightwaves remain constant,while receding lightwaves are invisible.
• D)There is no difference

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