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JEE 2020: Weekly Quiz 24 (01.09.2019)
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Question 1
In single slit experiment, the wideth of the slit is reduced. Then, the linear width of the principal maxima....
Question 2
Red light of wavelength 625 nm is incident normally on an optical diffraction grating with 2×105 lines/m. Including central principal maxima, how many maxima may be observed on a screen which is far from the grating?
Question 3
The wavelength of the light used in Young’s double slit experiment is λ. The intensity at a point on the screen where the path difference is 
isI. If I0 denotes the maximum intensity, then the ratio of I and I0 is
isI. If I0 denotes the maximum intensity, then the ratio of I and I0 is Question 4
What is the minimum thickness of a thin film required for constructive interference in the reflected light from it?
Given, the refractive index of the film = 1.5, wavelength of the light incident on the film = 600 nm.
Given, the refractive index of the film = 1.5, wavelength of the light incident on the film = 600 nm.
Question 5
In Young's double slit experiment, the spacing between the slits is d and wavelength of light used is 6000 
. If the angular width of a fringe on a distance since is 1 ° then value of d is
. If the angular width of a fringe on a distance since is 1 ° then value of d is Question 6
Two light sources are said to be coherent if they are obtained from
Question 7
In a double slit experiment, 5th dark fringe is formed opposite to one of the slits, the wavelength of light is
Question 8
Two coherent sources 'P' and 'Q' produce interference at point 'A' on the screen where there is a dark band which is formed between 4th bright band and 5th blight band. Wavelength of light used is 6000 A. The path difference between PA and QA is
Question 9
Two polaroids A and B are placed with their polaroid axes 30° to each other as shown in the figure. A plane polarized light passes through the polaroid A and after passing through it, the intensity of light becomes Io.What is the intensity of finally transmitted light after passing through the polaroid B?
Question 10
The wavelength of light used in an optical instrument are 
and 
,then the ratio of their respective resolving powers (corresponding to 
and 
) is:
and ,then the ratio of their respective resolving powers (corresponding to and ) is:Question 11
Let L be the line y = 2x, in the two-dimensional plane.
Statement 1: The image of the point (0, 1) in L is the point 
Statement 2: The points (0, 1) and 
lies on opposite sides of the line L and are at equal distance from it.
Question 12
The square of distance between the point of intersection of the lines represented by the equation 
and origin, is
and origin, is
Question 13
The vertices of a triangle are (2, 1), (5, 2) and (4, 4). The lengths of the perpendicular from these vertices on the opposite sides are
Question 14
Let Q be the foot of perpendicular from the origin to the plane 4x – 3y + z + 12 = 0 and R be a point (-1, 1, -6) on the plane. Then length QR is:
Question 15
The shortest distance between the point 
and the curve 
is:
and the curve is: Question 16
Find the value of k where k is defined as the distance from the point P(2,3,1) to the line 
is
is Question 17
Find the distance between the parallel lines 
and 
and Question 18
Find the distance between the parallel lines 
and
and Question 19
Find the distance between the parallel lines 
and
and Question 20
Find the distance of a point 
from
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Dec 22JEE & BITSAT
