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1
NDA General Ability 16 April 2023
MCQ (Single Correct Answer)
+4
-1.33
Change Language
Which one among the following is true for the speed of sound in a given medium?
A
Speed of sound remains same at all frequencies
B
Speed of sound is faster at higher frequencies
C
Speed of sound is slower at higher frequencies
D
Speed of sound is slower at higher wavelengths
2
NDA General Ability 16 April 2023
MCQ (Single Correct Answer)
+4
-1.33
Change Language
Which one of the following telescopes contains only mirrors?
A
Galilean telescope
B
Keplerian telescope
C
Newtonian telescope
D
Schmidt telescope
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