Physics-
General
Easy
Question
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
- Straight
- Circular
- Equally spaced
- Having fringe spacing which increases as we go outwards
The correct answer is: Straight
The cylindrical surface touches the glass plate along a line parallel to axis of cylinder. The thickness of wedge shaped film increases on both sides of this line. Locus of equal path difference are the lines running parallel to the axis of the cylinder. Hence straight fringes are obtained.
Related Questions to study
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 AB 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 AB undergo interference. The ratio is
physics-General
maths-
If X and Y are two independent variables with means 5 and 10 and variances 4 and 9 respectively. If 
, then r (U, V) is equal to-
If X and Y are two independent variables with means 5 and 10 and variances 4 and 9 respectively. If , then r (U, V) is equal to-
maths-General
chemistry-
For the reaction 
If 1 mol of 
,then the value of in the reaction is
For the reaction If 1 mol of ,then the value of in the reaction is
chemistry-General
physics-
Light wave is travelling along y-direction. If the corresponding 
vector at any time is along the x-axis, the direction of 
vector at that time is along
Light wave is travelling along y-direction. If the corresponding vector at any time is along the x-axis, the direction of vector at that time is along
physics-General
physics-
The intensity of gamma radiation from a given source is I. On passing through 36 mm of lead, it is reduced to 
. The thickness of lead which will reduce the intensity to 
will be
The intensity of gamma radiation from a given source is I. On passing through 36 mm of lead, it is reduced to . The thickness of lead which will reduce the intensity to will be
physics-General
Maths-
If 
, then the value of 
is-
If , then the value of is-
Maths-General
chemistry-
An organic Compound 
forms a precipitate with Tollens and Fehling’s regents. (A) has an isomer (B) . (B) reacts with 1 mol of 
to form 1, 4 dibromo-2-butene. (A) and (B) are:
An organic Compound forms a precipitate with Tollens and Fehling’s regents. (A) has an isomer (B) . (B) reacts with 1 mol of to form 1, 4 dibromo-2-butene. (A) and (B) are:
chemistry-General
chemistry-
In alkaline medium, 
and is itself reduced to 
How many moles of 
are oxidized by 1 mol of 
In alkaline medium, and is itself reduced to How many moles of are oxidized by 1 mol of
chemistry-General
physics-
Figure represents a glass plate placed vertically on a horizontal table with a beam of Unpolarised light falling on its surface at the Polarising angle of 
with the normal. The electric vector in the reflected light on screen S will vibrate with respect to the plane of incidence in a
Figure represents a glass plate placed vertically on a horizontal table with a beam of Unpolarised light falling on its surface at the Polarising angle of with the normal. The electric vector in the reflected light on screen S will vibrate with respect to the plane of incidence in a
physics-General
chemistry-
An aromatic compound 
on oxidation with acidic 
gives dibasic acid.The compound (A) on nitration gives three isomeric nitro derivatives.The compound (A) is:
An aromatic compound on oxidation with acidic gives dibasic acid.The compound (A) on nitration gives three isomeric nitro derivatives.The compound (A) is:
chemistry-General
Maths-
If A = {x : x 
N, x is a factor of 6} and B = {x N : x is a factor of 8} then 
is
When we have to find intersection of two sets, we have to find their common elements. When we have to find union of two sets, we have to consider all the elements of both the sets.
If A = {x : x N, x is a factor of 6} and B = {x N : x is a factor of 8} then is
Maths-General
When we have to find intersection of two sets, we have to find their common elements. When we have to find union of two sets, we have to consider all the elements of both the sets.
chemistry-
Which of the following is not an intra molecular redox reaction?
Which of the following is not an intra molecular redox reaction?
chemistry-General
Maths-
The roster form of the set A = {x : x N, x < 8} is
Roster form gives us list of all elements of the sets. Set builder form gives the details of the set in compact form.
The roster form of the set A = {x : x N, x < 8} is
Maths-General
Roster form gives us list of all elements of the sets. Set builder form gives the details of the set in compact form.
chemistry-
The appropriate reagent for the following transformation is:
The appropriate reagent for the following transformation is:
chemistry-General
chemistry-
The oxidation number of Pt in 
is
The oxidation number of Pt in is
chemistry-General
