CDS 2009 PYQ with Answer — Radio waves are reflected back to earth from the

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Atlas Essay Optional Vistaar

UPSC CDSCombined Defence Services Overview

Test Series

Daily Quiz
Mock Tests
All-India Test

Study

Syllabus
PYQs
Trends
Practice

Progress

Analytics
Rankings
Results

AI Tools

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Exit to Mains

Overview Daily Quiz Mock Tests All-India PYQs Practice

CDS 2009 · General Knowledge (CDS-II)Q44

Back to the full 2009 paper

2009 · Q44

Radio waves are reflected back to earth from the

General KnowledgePhysics

ATroposphere
BExosphere
CStratosphere
DIonosphere

Explanation

Radio waves reflect off the ionosphere.

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