AIIMS2019PhysicsRay Optics
A telescope, whose objective lens has an aperture of 1 ~mm for the wavelength of light 500 Å , then limiting resolving power of the telescope is
Options
- A2.1 10⁻⁵ rad
- B4.1 10⁻⁵ rad
- C5.1 10⁻⁵ rad
- D6.1 10⁻⁵ rad
Correct answer
D. 6.1 10⁻⁵ rad
Step-by-step solution
Given: Aperture of objective lens (a)=1 ~mm =1 10⁻³ ~m Wavelength of light ( )=500 Å=500 10⁻¹⁰ ~m Limiting resolving power of telescope, d = 1.22 a = 1.22 500 10⁻¹⁰ 1 10⁻³ =6.1 10⁻⁵ rad