1
AP EAPCET 2024 - 22th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
The angle between the axes of a polariser and an analyser is $45^{\circ}$. If the intensity of the unpolarised light incident on the polariser is $I$, then the intensity of light emerged from the analyser is
A
21
B
$\frac{1}{2}$
C
1
D
$\frac{1}{4}$
2
AP EAPCET 2024 - 22th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

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

A
$1.4 \times 10^{-4} \mu \mathrm{~m}$
B
$1.2 \times 10^{-5} \mathrm{~m}$
C
$1.3 \mu \mathrm{~m}$
D
$1.2 \mu \mathrm{~m}$
3
AP EAPCET 2024 - 21th May Evening Shift
MCQ (Single Correct Answer)
+1
-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
A
$\frac{a}{\lambda}=1000$
B
$\frac{a}{\lambda} \leq 1$
C
$a \ll \lambda$
D
$a \gg \lambda$
4
AP EAPCET 2024 - 20th May Evening Shift
MCQ (Single Correct Answer)
+1
-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
A
$4 \mu \mathrm{~m}$
B
$6 \mu \mathrm{~m}$
C
$3 \mu \mathrm{~m}$
D
$9 \mu \mathrm{~m}$
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