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CBSE Class 12-science Answered

the least resolvable angle by a telescope using objective of aperture 5 cm and light of lambda=4000 Adegree (angestrom) is nearly?  (ans. 1divided by50 sec. ) pls explain how? 
Asked by Nidhi | 25 Dec, 2014, 12:14: AM
answered-by-expert Expert Answer
Given that λ = 4000 Å = 4000 × 10-10 m 
aperture size, d = 5 cm
begin mathsize 14px style theta subscript m i n end subscript equals space lambda over d equals fraction numerator 4000 cross times 10 to the power of minus 8 end exponent over denominator 5 space end fraction equals 800 cross times 10 to the power of minus 8 space end exponent r a d theta subscript m i n end subscript equals space 800 space cross times 10 to the power of minus 8 end exponent r a d theta subscript m i n end subscript space equals space 0.0165011 space s e c rightwards double arrow theta subscript m i n end subscript space equals space 1 over 50 s e c end style

Answered by Jyothi Nair | 26 Dec, 2014, 08:49: AM

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