AP EAPCET 2025 - 21st May Morning Shift | Wave Optics Question 9 | Physics

In Young's double slit experiment, the wavelengths of red and blue lights used are $7.5 \times 10^{-5} \mathrm{~cm}$ and $5 \times 10^{-5} \mathrm{~cm}$ respectively. If $n$th bright fringe of red color coincides with $(n+1)$ th bright fringe of blue colour, then the value of ' $n$ ' is

AP EAPCET 2024 - 23th May Morning Shift

MCQ (Single Correct Answer)

-0

Two light waves of intensities $I$ and $2 I$ superimpose on each other. If the path difference between the light waves reaching a point is $12.5 \%$ of the wavelength of the light, then the resultant intensity at the point, is (Both the light waves have same wavelength)

AP EAPCET 2024 - 22th May Evening Shift

MCQ (Single Correct Answer)

-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

$\frac{1}{2}$

$\frac{1}{4}$

AP EAPCET 2024 - 22th May Morning Shift

MCQ (Single Correct Answer)

-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

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

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

$1.3 \mu \mathrm{~m}$

$1.2 \mu \mathrm{~m}$

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