JEE PYQ: Wave Optics Question 25
Question 25 - 2019 (08 Apr Shift 2)
Calculate the limit of resolution of a telescope objective having a diameter of 200 cm, if it has to detect light of wavelength 500 nm coming from a star.
(1) $305 \times 10^{-9}$ radian
(2) $610 \times 10^{-9}$ radian
(3) $152.5 \times 10^{-9}$ radian
(4) $457.5 \times 10^{-9}$ radian
Show Answer
Answer: (1)
Solution
$\theta = \frac{1.22\lambda}{d} = \frac{1.22 \times 500 \times 10^{-9}}{2} = 305 \times 10^{-9}$ rad
BETA
