Two plane mirrors are inclined at math xmlns=http://www.w3.org/1998/Math/MathML class=wrs_chemis...

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Two plane mirrors are inclined at math xmlns=http://www.w3.org/1998/Math/MathML class=wrs_chemistrymn70/mnmo°/mo/math. A ray incident on one mirror at angle math xmlns=http://www.w3.org/1998/Math/MathMLmiθ/mi/math after reflection falls on the second mirror and is reflected from there parallel to the first mirror, math xmlns=http://www.w3.org/1998/Math/MathMLmiθ/mi/math is:
a. math xmlns=http://www.w3.org/1998/Math/MathMLmn50/mnmo°/mo/math
b. math xmlns=http://www.w3.org/1998/Math/MathMLmn45/mnmo°/mo/math
c. math xmlns=http://www.w3.org/1998/Math/MathMLmn30/mnmo°/mo/math
d. math xmlns=http://www.w3.org/1998/Math/MathMLmn55/mnmo°/mo/math
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