AP EAPCET 2024 - 22th May Morning Shift | Wave Optics Question 3 | Physics

If a slit of width $x$ was illuminated by red light having wavelength $6500\mathop {\rm{A}}\limits^{\rm{^\circ }}$, the first minima was obtained at $\theta=30^{\circ}$. Then, the value of $x$ is

$1.4 \times 10^{-4} \mu \mathrm{~m}$

$1.2 \times 10^{-5} \mathrm{~m}$

$1.3 \mu \mathrm{~m}$

$1.2 \mu \mathrm{~m}$

AP EAPCET 2024 - 21th May Evening Shift

MCQ (Single Correct Answer)

-0

In case of diffraction, if $a$ is a slit width and $\lambda$ is the wavelength of the incident light, then the required condition for diffraction to take place is

$\frac{a}{\lambda}=1000$

$\frac{a}{\lambda} \leq 1$

$a \ll \lambda$

$a \gg \lambda$

AP EAPCET 2024 - 20th May Evening Shift

MCQ (Single Correct Answer)

-0

If a microscope is placed in air, the minimum separation of two objects seen as distinct is $6 \mu \mathrm{~m}$. If the same is placed in a medium of refractive index 1.5, then the minimum separation of the two objects to see as distinct is

$4 \mu \mathrm{~m}$

$6 \mu \mathrm{~m}$

$3 \mu \mathrm{~m}$

$9 \mu \mathrm{~m}$

AP EAPCET 2024 - 20th May Morning Shift

MCQ (Single Correct Answer)

-0

In Young's double slit experiment two slits are placed 2 mm from each other. Interference pattern is observed on a screen placed 2 m from the plane of the slits. Then the fringe width for a light of wavelength 400 nm is

$0.4 \times 10^{-6} \mathrm{~m}$

$4 \times 10^{-6} \mathrm{~m}$

$0.4 \times 10^{-3} \mathrm{~m}$

400 m

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