alleryA telescope objective has diameter 2.5 m. Its angular resolution at $\lambda = 5500$ Å is approximately:
A$2.7 \times 10^{-7}$ rad (~0.06 arcsec)
B$2.7 \times 10^{-3}$ rad
C$1.0$ arcsec
D$5.5 \times 10^{-10}$ rad
Answer & Solution
Correct answer: A. $2.7 \times 10^{-7}$ rad (~0.06 arcsec)
$\theta = 1.22\lambda/D = 1.22 \times 5.5 \times 10^{-7}/2.5 \approx 2.68 \times 10^{-7}$ rad ≈ 0.06 arcsec.
Larger apertures give better angular resolution.
Keep practising Dual Nature of Radiation and Matter
Browse all Dual Nature of Radiation and Matter questions for AP Intermediate 2nd Year, or explore more Physics topics.
Related questions
However intense the light, no emission occurs below the:The minimum energy needed to free an electron from a metal is its:Order the photoelectric storyPhotoelectric current falls to zero at which voltage?The de Broglie relation contains a wave concept together with a:The momentum carried by a photon of wavelength $\lambda$ isSet by intensity or by frequency?The de Broglie wavelength of a fast electron is comparable with: