Physics-
General
Easy
Question
Two point sources X and Y emit waves of same frequency and speed but Y lags in phase behind X by 2
l radian. If there is a maximum in direction D the distance XO using n as an integer is given by
The correct answer is:
For maxima 
or 
or 
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Physics-
Two ideal slits S1 and S2 are at a distance d apart, and illuminated by light of wavelength 
passing through an ideal source slit S placed on the line through S2 as shown. The distance between the planes of slits and the source slit is D. A screen is held at a distance D from the plane of the slits. The minimum value of d for which there is darkness at O is
Two ideal slits S1 and S2 are at a distance d apart, and illuminated by light of wavelength passing through an ideal source slit S placed on the line through S2 as shown. The distance between the planes of slits and the source slit is D. A screen is held at a distance D from the plane of the slits. The minimum value of d for which there is darkness at O is
Physics-General
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A monochromatic beam of light falls on YDSE apparatus at some angle (say 
) as shown in figure. A thin sheet of glass is inserted in front of the lower slit S2. The central bright fringe (path difference = 0) will be obtained
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Physics-General
Chemistry-
Given 
The number of electrons present in l = 2 is
Given The number of electrons present in l = 2 is
Chemistry-General
Maths-
Plot A(3,-5) on a carteaion plane.
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Maths-General
Maths-
If 
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The integral 
equal
The integral equal
Maths-General
Maths-
If 
log
f(x) 
then 
If logf(x) then
Maths-General
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An incomplete frequency distribution is given below Median value is 46, the missing frequency is
An incomplete frequency distribution is given below Median value is 46, the missing frequency is
Maths-General
Physics-
In the adjacent diagram, CP represents a wave front and AO & BP, the corresponding two rays. Find the condition on q for constructive interference at P between the ray BP and reflected ray OP
In the adjacent diagram, CP represents a wave front and AO & BP, the corresponding two rays. Find the condition on q for constructive interference at P between the ray BP and reflected ray OP
Physics-General
Physics-
A thin slice is cut out of a glass cylinder along a plane parallel to its axis. The slice is placed on a flat glass plate as shown. The observed interference fringes from this combination shall be
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Physics-General
Physics-
A ray of light of intensity I is incident on a parallel glass-slab at a point A as shown in fig. It undergoes partial reflection and refraction. At each reflection 25% of incident energy is reflected. The rays AB and A'B' undergo interference. The ratio 
is
A ray of light of intensity I is incident on a parallel glass-slab at a point A as shown in fig. It undergoes partial reflection and refraction. At each reflection 25% of incident energy is reflected. The rays AB and A'B' undergo interference. The ratio is
Physics-General
Physics-
AB is incident wave front on mirror R and mirror S whereas PQ and 
is reflected wave front from mirror R and mirror S respectively. Choose the correct statement
AB is incident wave front on mirror R and mirror S whereas PQ and is reflected wave front from mirror R and mirror S respectively. Choose the correct statement
Physics-General
Physics-
In the diagram shown, the separation between the slit is equal to 
where is the wavelength of the light incident on the plane of the slits A thin film of thickness 
and refractive index 2 has been placed in the front of the upper slit. Assuming 
the distance of the central maxima on the screen from O is:
In the diagram shown, the separation between the slit is equal to where is the wavelength of the light incident on the plane of the slits A thin film of thickness and refractive index 2 has been placed in the front of the upper slit. Assuming the distance of the central maxima on the screen from O is:
Physics-General
Physics-
Three weight A, B and C are connected by string as shown in the figure. The system moves over a frictionless pulley. The tension in the string connecting A and B is (where g is acceleration due to gravity)
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Physics-General
Physics-
As shown in the figure, two equal masses each of 2 kg are suspended from a spring balance. The reading of the spring balance will be
As shown in the figure, two equal masses each of 2 kg are suspended from a spring balance. The reading of the spring balance will be
Physics-General
