Which of the following is true when a ray is incident normally in an I – McqOptions

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1.	Which of the following is true when a ray is incident normally in an Ionosphere region?
A.	MUF is equal to critical frequency
B.	MUF is greater than critical frequency
C.	MUF is less than critical frequency
D.	MUF is zero
Answer» B. MUF is greater than critical frequency

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