Physics-
General
Easy
Question
Consider the following diagram The incident ray parallel to the optical axis passing through
- left foci
- right focus
- optical centre
- (b) & (c)
The correct answer is: right focus
Related Questions to study
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A layered lens as shown in the figure is made of two materials indicated by different shades. A point object is placed on its axis. The lens will form.
A layered lens as shown in the figure is made of two materials indicated by different shades. A point object is placed on its axis. The lens will form.
physics-General
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A prism of refractive index 
is immersed in water of refractive index 
. For the total internal reflection the correct choice is
A prism of refractive index is immersed in water of refractive index . For the total internal reflection the correct choice is
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For a prism PQR the incident and emergent rays are parallel. The minimum value of refractive index of the prism material is
For a prism PQR the incident and emergent rays are parallel. The minimum value of refractive index of the prism material is
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When the prism is in the minimum deviation position (Figure). Choose the correct one.
When the prism is in the minimum deviation position (Figure). Choose the correct one.
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Figure shows a cross - section of light pipe made of glass fibre of refractive index 1.68. The outer coating of the pipe is made of a material of refractive index 1.44. What is the range of angles of the incident rays with the axis of the pipe for which total internal reflection inside the pipe takes place ?
Figure shows a cross - section of light pipe made of glass fibre of refractive index 1.68. The outer coating of the pipe is made of a material of refractive index 1.44. What is the range of angles of the incident rays with the axis of the pipe for which total internal reflection inside the pipe takes place ?
physics-General
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A vessel contains a slab of glass 8cm thick and of refractive index 1.6 over the slab, the vessel is filled by oil of refractive index m upto height 4.5 cm and also by another liquid i.e., water of refractive index 
and height 6cm as shown in figure. An observer looking down from above, observes that, a mark at the bottom of the glass slab appears to be raised up to position 6cm from the bottom of the slab. The refractive index of the oil is
A vessel contains a slab of glass 8cm thick and of refractive index 1.6 over the slab, the vessel is filled by oil of refractive index m upto height 4.5 cm and also by another liquid i.e., water of refractive index and height 6cm as shown in figure. An observer looking down from above, observes that, a mark at the bottom of the glass slab appears to be raised up to position 6cm from the bottom of the slab. The refractive index of the oil is
physics-General
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In the Figure, AB and BK represent incident and reflected rays. If angle BCF = 35º. Then 
. will be equal to ____ degrees
In the Figure, AB and BK represent incident and reflected rays. If angle BCF = 35º. Then . will be equal to ____ degrees
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Assertion : The net deviation suffered by a light ray incident on a plane mirror as shown in the figure is 
Reason : A ray of light is incident on a plane mirror at an angle i with the normal to the mirror. It strikes another plane mirror inclined at an angle 
with the first mirror. It is given that 
The net deviation produced after reflection once from each mirror is
.
A) If both Assertion and Reason are true and Reason is the correct explanation of the Assertion.
B) If both Assertion and Reason are true but Reason is not correct explanation of the Assertion.
C) If Assertion is true but Reason is false.
D) If Assertion is false but Reason is true.
Assertion : The net deviation suffered by a light ray incident on a plane mirror as shown in the figure is
Reason : A ray of light is incident on a plane mirror at an angle i with the normal to the mirror. It strikes another plane mirror inclined at an angle with the first mirror. It is given that The net deviation produced after reflection once from each mirror is.
A) If both Assertion and Reason are true and Reason is the correct explanation of the Assertion.
B) If both Assertion and Reason are true but Reason is not correct explanation of the Assertion.
C) If Assertion is true but Reason is false.
D) If Assertion is false but Reason is true.
physics-General
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Assertion : In YDSE number of bridge figure or dark fringe can not be unlimited
Reason : In YDSE path difference between the superposing waves can not be more than the distance between the slits.
A) If both Assertion and Reason are true and Reason is the correct explanation of the Assertion.
B) If both Assertion and Reason are true but Reason is not correct explanation of the Assertion.
C) If Assertion is true but Reason is false.
D) If Assertion is false but Reason is true.
Assertion : In YDSE number of bridge figure or dark fringe can not be unlimited
Reason : In YDSE path difference between the superposing waves can not be more than the distance between the slits.
A) If both Assertion and Reason are true and Reason is the correct explanation of the Assertion.
B) If both Assertion and Reason are true but Reason is not correct explanation of the Assertion.
C) If Assertion is true but Reason is false.
D) If Assertion is false but Reason is true.
physics-General
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Assertion : A beam of light containing radiations of only two wavelengths is incident on a prism. It is found that radiations of one wavelength come out from the face AC of the prism but radiations of other wavelength does not.
Reason : The condition of total internal reflection is satisfied for one wavelength and not for other.
A) If both Assertion and Reason are true and Reason is the correct explanation of the Assertion.
B) If both Assertion and Reason are true but Reason is not correct explanation of the Assertion.
C) If Assertion is true but Reason is false.
D) If Assertion is false but Reason is true.
Assertion : A beam of light containing radiations of only two wavelengths is incident on a prism. It is found that radiations of one wavelength come out from the face AC of the prism but radiations of other wavelength does not.
Reason : The condition of total internal reflection is satisfied for one wavelength and not for other.
A) If both Assertion and Reason are true and Reason is the correct explanation of the Assertion.
B) If both Assertion and Reason are true but Reason is not correct explanation of the Assertion.
C) If Assertion is true but Reason is false.
D) If Assertion is false but Reason is true.
physics-General
physics-
In an interference arrangement similar to Young's double – slit experiment, the slits 
and 
are illuminated with coherent microwave sources, each of frequency 
The sources are synchronized to have zero phase difference. The slits are separated by a distance 
The intensity 
is measured as a function of 
where is defined as shown. If 
is the maximum intensity, then for 
is given by
In an interference arrangement similar to Young's double – slit experiment, the slits and are illuminated with coherent microwave sources, each of frequency The sources are synchronized to have zero phase difference. The slits are separated by a distance The intensity is measured as a function of where is defined as shown. If is the maximum intensity, then for is given by
physics-General
physics-
In an interference arrangement, similar to Young's double slit experiment, the slits 
and are illuminated with coherent microwave sources, each of frequency 
Hz. The sources are syn necrotized to have zero phase difference. The slits are separated by distance 
The intensity 
is measured as a function of where is defined as shown in figure. If is maximum intensity, then for 
is given by
In an interference arrangement, similar to Young's double slit experiment, the slits and are illuminated with coherent microwave sources, each of frequency Hz. The sources are syn necrotized to have zero phase difference. The slits are separated by distance The intensity is measured as a function of where is defined as shown in figure. If is maximum intensity, then for is given by
physics-General
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A parallel narrow beam of light is incident on the surface of a transparent hemisphere of radius R and refractive index 
as shown. The position of the image formed by refraction at the spherical surface only is
A parallel narrow beam of light is incident on the surface of a transparent hemisphere of radius R and refractive index as shown. The position of the image formed by refraction at the spherical surface only is
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A glass prism of refractive index 1.5 is immersed in water 
Light beam incident normally on the face AB is totally reflected to reach the face BC if
A glass prism of refractive index 1.5 is immersed in water Light beam incident normally on the face AB is totally reflected to reach the face BC if
physics-General
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Two identical sources P and Q emit waves in same phases and of same wavelength. Spacing between P and Q is 
The maximum distance from P along the x-axis at which a minimum intensity occurs is given by
Two identical sources P and Q emit waves in same phases and of same wavelength. Spacing between P and Q is The maximum distance from P along the x-axis at which a minimum intensity occurs is given by
physics-General
