A layer in the Earth’s atmosphere called Ionosphere fa

| M: +2.00/-0.67

A layer in the Earth’s atmosphere called Ionosphere facilitates radio communication. Why?

1. The presence of ozone causes the reflection of radio waves to Earth.

2. Radio waves have a very long wavelength.

Which of the statements given above is/are correct?

?????????? ???? ?????? ?? ???????? ??? ?? ??? ?????? ????? ?? ?????? ?????? ???? ??? ??????

1. ???? ?? ???????? ?????? ?? ?????? ?????? ?? ????????? ?? ???? ???? ???

2. ?????? ?????? ??? ???? ???? ???? ??????? ???? ???

??? ??? ?? ????? ??? ?? ??? ?? ??? ?? / ????

[UPSC IAS Prelims 2011]

A 1 only

1 ही

B 2 only

२ ही

C Both 1 and 2

दोनों 1 और 2

D Neither 1 nor 2

न तो 1 और न ही 2

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