iCON Education - Wave Optics AP-EAPCET Test

According to Rayleigh, when sunlight travels through atmosphere, the amount of scattering is proportional to $n$th power of wavelength of light. Then, the value of 'r is

In Young' double slit experiment, if the distance between the slits is 2 mm and the distance of the screen from the slits is 100 cm , the fringe width is 0.36 mm . If the distance between the slit is decreased by 0.5 mm and the distance of the screen from the slits is increased by 50 cm , the fringe width becomes

In an experiment, two polariods are arranged such that the intensity of the polarised light emerged from the second polaroid is $37.5 \%$ of the intensity of the unpolarised light incident on the first polaroid. Then the angle between the axes of the two polaroids is

A narrow slit of width 2 mm is illuminated with a monochromatic light of wavelength 500 nm . If the distance between the slit and the screen is 1 m , then first minima are separated by a distance of

In Young's double slit experiment, if the distance between the slits is increased to 3 times initial distance, then the ratio of initial and final fringe widths is

In Young's double slit experiment, the distance between the slits is 0.2 cm , the distance between the screen and the slits is 1 m . If the wavelength of light used in the experiment is $5000 \mathop {\rm{A}}\limits^{\rm{o}}$, then the distance between two consecutive dark fringes on the screen is

In Young's double slit experiment, the wavelength of monochromatic light is increased by $20 \%$ and the distance between the two slits is decreased by $25 \%$. If the initial fringe width is 0.3 mm , then the final fringe width is

An unpolarised beam of light incidents on a group of three polarising sheets arranged such that the angle between the axes of any two adjascent sheets is $30^{\circ}$. The ratio of the intensities of polarised light emerging from the second and third sheets is

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

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)

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

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

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

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

$1.3 \mu \mathrm{~m}$

$1.2 \mu \mathrm{~m}$

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

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

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

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

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

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

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

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

In Young's double slit experiment, the intensity at a point where the path difference is $\frac{\lambda}{6}$ ( $\lambda$ being the wavelength of the light used) is $I$. If $I_0$ denotes the maximum intensity, $\frac{I}{I_0}$ is equal to

$\frac{1}{\sqrt{2}}$

$\frac{\sqrt{3}}{2}$

In Young's double slit experiment with monochromatic light of wavelength 6000 A . The fringe width is 3 mm . If the distance between the screen and slits is increased by $50 \%$ and the distance between the slits is decreased by $10 \%$, then the fringe width is

Young's double slit experiment is conducted with monochromatic light of wavelength 5000$\mathop A\limits^o $, with slit separation of 3 mm and observer at 20 cm away from the slits. If a 1 mm transparent plate is placed infront of one of the slits, the fringes shift by 6 mm . The refractive index of the transparent plate is

In Young's double slit experiment the slits are 3 mm apart and are illuminated by light of two wavelengths $3750 \mathop A\limits^o$ and $7500 \mathop A\limits^o$. The screen is placed at 4 m from the slits. The minimum distance from the common central bright fringe on the screen at which the bright fringe of one interference pattern due to one wavelength coincide with the bright fringe of the other is

When monochromatic light of wavelength 600 nm is used in Young's double slit experiment, the fifth order bright fringe is formed at 6 mm from the central bright fringe on the screen. If the experiment is conducted with light of wavelength 400 nm from the central bright fringe, the third order bright fringe will be located at

The wavefront is a surface in which

all points are in the same phase

there are pairs of points in opposite phase

there are pairs of points with phase difference $\left(\frac{\pi}{2}\right)$

there is no relation between the phases

The position of the direct image obtained at O, when a monochromatic beam of light is passed through a plane transmission grating at normal incidence is shown in figure. The diffracted images A, B, and C correspond to the first, second and third order diffraction. When the source is replaced by another source of shorter wavelength,

AP EAPCET 2021 - 20th August Morning Shift Physics - Wave Optics Question 22 English 1

all the four will shift in the direction C to O

all the four will shift in the direction O to C

the images C, B and A will shift towards O

the images C, B and A will shift away from O

In Young’s double slit experiment, the separation between the slits is halved and the distance between the screen is doubled. The fringe width is

In a diffraction pattern due to a single slit of width $a$, the first minimum is observed at an angle $30 \Upsilon$ when light of wavelength $500 \mathrm{~nm}$ is incident on the slit. The first secondary maximum is observed at an angle of

$\sin ^{-1}\left(\frac{1}{2}\right)$

$\sin ^{-1}\left(\frac{3}{4}\right)$

$\sin ^{-1}\left(\frac{1}{4}\right)$

$\sin ^{-1}\left(\frac{2}{3}\right)$