Gujarati
11.Dual Nature of Radiation and matter
medium

$1$ मीटर लम्बी छड़ी $2.7 \times {10^8}m{s^{ - 1}}$ के वेग से गतिमान है। छड़ी की अभासी लम्बाई ........... $m$ है (जहाँ$c = 3 \times {10^8}$ मी/सै)

A

$10 $

B

$0.22$

C

$0.44$

D

$2.4$

Solution

$l = {l_0}\sqrt {1 – \frac{{{v^2}}}{{{c^2}}}} $$ = 1\sqrt {1 – {{\left( {\frac{{2.7 \times {{10}^8}}}{{3 \times {{10}^8}}}} \right)}^2}} \Rightarrow l = 0.44\;m$

Standard 12
Physics

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