Multiple choice question XV — task. Science CBSE, Class 9.

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எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

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1. Non-mechanical (electromagnetic) wave can propagate in:

material medium as well as vacuum
in vacuum, but not in material medium
in material medium but not in vacuum
neither in material medium nor in vacuum

2. The linear distance between a compression and a rarefaction or a crest and a trough is:

\(\frac{\lambda}{2}\)
\(\frac{\lambda}{4}\)
\(\lambda\)
\(\frac{3\lambda}{2}\)

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