Wave Optics
Wave Optics
Top questions
See all →- In Young's double slit experiment, slit separation is 0.5 mm, the screen is 1 m away and \(\lambda=600\) nm. The fringe width is Answer: A. 1.2 mm β=λ D/d=frac600×10⁻⁹×10.5×10⁻³=1.2×10⁻³ m. 1
- The polarising (Brewster) angle for a glass of refractive index \(\sqrt3\) is Answer: D. 60° tanθ_p=μ=sqrt3⇒θ_p=60^° . 1
- Light of wavelength 500 nm falls normally on a single slit of width 0.2 mm. The width of the central maximum on a screen 2 m away is Answer: D. 10 mm W=2λ D/a=frac2×5×10⁻⁷×22×10⁻⁴=10⁻² m =10 mm. 1
- The distance between two consecutive bright fringes in a biprism experiment using light of wavelength 6000 Å Given : λ₁ = 6000 Å = 6 x 10⁻⁷ m, λ_(2 )= 4800 Å = 4.8 x 10⁻⁷ m, W₁ = 0.32 mm =3.2 x 10⁻⁴ m Distance between consecutive bright fringes, W =... 1
- A star is emitting light at the wavelength of 5000 Å. Determine the limit of resolution of a telescope Given : λ = 5000 Å = 5 x 10⁻⁷ m, D = 200 x 2.54 cm = 5.08 m θ = 1.22λ/D = frac(1.22)(5×10⁻⁷)5.08 = 1.2×10⁻⁷ rad 1
- Monochromatic electromagnetic radiation from a distant source passes through a slit. Given : 2W = 6mm W = 3mm = 3 x 10⁻^(3 )m, y=2.5 m, (a) λ₁ = 500 nm = 5 x 10⁻^(7 )m (b) λ₂ = 50 μm = 5 x 10⁻^(5 )m (c) λ_(3 )= 0.500 nm = 5 x... 1