282846
In a reflecting telescope, a secondary mirror is used to:
1 reduce the problem of mechanical support
2 remove spherical aberration
3 make chromatic aberration zero
4 move the eyepiece outside the telescopic tube
Explanation:
D: In reflecting telescope the secondary mirror divert all way in the direction of eyepiece.
It has advantage of a large focal length in a shot telescope
JEE Main-08.04.2023
Ray Optics
282847
A scientist is observing a bacteria through a compound microscope. For better analysis and to improve its resolving power he should. (Select the best option)
1 Decrease the focal length of the eye piece.
2 Increase the wave length of the light
3 Decrease the diameter of the objective lens
4 Increase the refractive index of the medium between the object and objective lens
Explanation:
D: Resolving power \(=\frac{\mu \sin r}{0.61 \lambda}\)
For compound microscope resolving power will increase by increasing refractive index of the medium between the object and objective lens by increasing diameter of the objective lens by decreasing the wavelength of the light.
JEE Main-29.01.2023
Ray Optics
282943
In a compound microscope, the intermediate image is:
1 virtual, erect and magnified
2 real, erect and magnified
3 real, inverted and magnified
4 virtual, erect and reduced
(e) none of the above
Explanation:
C: In a compound microscope, the intermediate image is real, inverted and magnified.
Kerala CEE 2004
Ray Optics
282982
An astronomical telescope consists of an objective lens that forms at or very near to its principle focus an image of the object which is
1 real, inverted and reduced
2 real, inverted and magnified
3 virtual, erect and reduced
4 real, erect and reduced
Explanation:
A: Image formed by objective of astronomical telescope is real, inverted and reduced.
SCRA-2014
Ray Optics
282983
For a person having hypermetropia
1 the near point shifts towards the eyes
2 the near point shifts away from the eyes
3 the far point shifts towards the eyes
4 the far point shifts away from the eyes
Explanation:
B: For a person having hypermetropia, the near point shifts away from eyes.
282846
In a reflecting telescope, a secondary mirror is used to:
1 reduce the problem of mechanical support
2 remove spherical aberration
3 make chromatic aberration zero
4 move the eyepiece outside the telescopic tube
Explanation:
D: In reflecting telescope the secondary mirror divert all way in the direction of eyepiece.
It has advantage of a large focal length in a shot telescope
JEE Main-08.04.2023
Ray Optics
282847
A scientist is observing a bacteria through a compound microscope. For better analysis and to improve its resolving power he should. (Select the best option)
1 Decrease the focal length of the eye piece.
2 Increase the wave length of the light
3 Decrease the diameter of the objective lens
4 Increase the refractive index of the medium between the object and objective lens
Explanation:
D: Resolving power \(=\frac{\mu \sin r}{0.61 \lambda}\)
For compound microscope resolving power will increase by increasing refractive index of the medium between the object and objective lens by increasing diameter of the objective lens by decreasing the wavelength of the light.
JEE Main-29.01.2023
Ray Optics
282943
In a compound microscope, the intermediate image is:
1 virtual, erect and magnified
2 real, erect and magnified
3 real, inverted and magnified
4 virtual, erect and reduced
(e) none of the above
Explanation:
C: In a compound microscope, the intermediate image is real, inverted and magnified.
Kerala CEE 2004
Ray Optics
282982
An astronomical telescope consists of an objective lens that forms at or very near to its principle focus an image of the object which is
1 real, inverted and reduced
2 real, inverted and magnified
3 virtual, erect and reduced
4 real, erect and reduced
Explanation:
A: Image formed by objective of astronomical telescope is real, inverted and reduced.
SCRA-2014
Ray Optics
282983
For a person having hypermetropia
1 the near point shifts towards the eyes
2 the near point shifts away from the eyes
3 the far point shifts towards the eyes
4 the far point shifts away from the eyes
Explanation:
B: For a person having hypermetropia, the near point shifts away from eyes.
282846
In a reflecting telescope, a secondary mirror is used to:
1 reduce the problem of mechanical support
2 remove spherical aberration
3 make chromatic aberration zero
4 move the eyepiece outside the telescopic tube
Explanation:
D: In reflecting telescope the secondary mirror divert all way in the direction of eyepiece.
It has advantage of a large focal length in a shot telescope
JEE Main-08.04.2023
Ray Optics
282847
A scientist is observing a bacteria through a compound microscope. For better analysis and to improve its resolving power he should. (Select the best option)
1 Decrease the focal length of the eye piece.
2 Increase the wave length of the light
3 Decrease the diameter of the objective lens
4 Increase the refractive index of the medium between the object and objective lens
Explanation:
D: Resolving power \(=\frac{\mu \sin r}{0.61 \lambda}\)
For compound microscope resolving power will increase by increasing refractive index of the medium between the object and objective lens by increasing diameter of the objective lens by decreasing the wavelength of the light.
JEE Main-29.01.2023
Ray Optics
282943
In a compound microscope, the intermediate image is:
1 virtual, erect and magnified
2 real, erect and magnified
3 real, inverted and magnified
4 virtual, erect and reduced
(e) none of the above
Explanation:
C: In a compound microscope, the intermediate image is real, inverted and magnified.
Kerala CEE 2004
Ray Optics
282982
An astronomical telescope consists of an objective lens that forms at or very near to its principle focus an image of the object which is
1 real, inverted and reduced
2 real, inverted and magnified
3 virtual, erect and reduced
4 real, erect and reduced
Explanation:
A: Image formed by objective of astronomical telescope is real, inverted and reduced.
SCRA-2014
Ray Optics
282983
For a person having hypermetropia
1 the near point shifts towards the eyes
2 the near point shifts away from the eyes
3 the far point shifts towards the eyes
4 the far point shifts away from the eyes
Explanation:
B: For a person having hypermetropia, the near point shifts away from eyes.
NEET Test Series from KOTA - 10 Papers In MS WORD
WhatsApp Here
Ray Optics
282846
In a reflecting telescope, a secondary mirror is used to:
1 reduce the problem of mechanical support
2 remove spherical aberration
3 make chromatic aberration zero
4 move the eyepiece outside the telescopic tube
Explanation:
D: In reflecting telescope the secondary mirror divert all way in the direction of eyepiece.
It has advantage of a large focal length in a shot telescope
JEE Main-08.04.2023
Ray Optics
282847
A scientist is observing a bacteria through a compound microscope. For better analysis and to improve its resolving power he should. (Select the best option)
1 Decrease the focal length of the eye piece.
2 Increase the wave length of the light
3 Decrease the diameter of the objective lens
4 Increase the refractive index of the medium between the object and objective lens
Explanation:
D: Resolving power \(=\frac{\mu \sin r}{0.61 \lambda}\)
For compound microscope resolving power will increase by increasing refractive index of the medium between the object and objective lens by increasing diameter of the objective lens by decreasing the wavelength of the light.
JEE Main-29.01.2023
Ray Optics
282943
In a compound microscope, the intermediate image is:
1 virtual, erect and magnified
2 real, erect and magnified
3 real, inverted and magnified
4 virtual, erect and reduced
(e) none of the above
Explanation:
C: In a compound microscope, the intermediate image is real, inverted and magnified.
Kerala CEE 2004
Ray Optics
282982
An astronomical telescope consists of an objective lens that forms at or very near to its principle focus an image of the object which is
1 real, inverted and reduced
2 real, inverted and magnified
3 virtual, erect and reduced
4 real, erect and reduced
Explanation:
A: Image formed by objective of astronomical telescope is real, inverted and reduced.
SCRA-2014
Ray Optics
282983
For a person having hypermetropia
1 the near point shifts towards the eyes
2 the near point shifts away from the eyes
3 the far point shifts towards the eyes
4 the far point shifts away from the eyes
Explanation:
B: For a person having hypermetropia, the near point shifts away from eyes.
282846
In a reflecting telescope, a secondary mirror is used to:
1 reduce the problem of mechanical support
2 remove spherical aberration
3 make chromatic aberration zero
4 move the eyepiece outside the telescopic tube
Explanation:
D: In reflecting telescope the secondary mirror divert all way in the direction of eyepiece.
It has advantage of a large focal length in a shot telescope
JEE Main-08.04.2023
Ray Optics
282847
A scientist is observing a bacteria through a compound microscope. For better analysis and to improve its resolving power he should. (Select the best option)
1 Decrease the focal length of the eye piece.
2 Increase the wave length of the light
3 Decrease the diameter of the objective lens
4 Increase the refractive index of the medium between the object and objective lens
Explanation:
D: Resolving power \(=\frac{\mu \sin r}{0.61 \lambda}\)
For compound microscope resolving power will increase by increasing refractive index of the medium between the object and objective lens by increasing diameter of the objective lens by decreasing the wavelength of the light.
JEE Main-29.01.2023
Ray Optics
282943
In a compound microscope, the intermediate image is:
1 virtual, erect and magnified
2 real, erect and magnified
3 real, inverted and magnified
4 virtual, erect and reduced
(e) none of the above
Explanation:
C: In a compound microscope, the intermediate image is real, inverted and magnified.
Kerala CEE 2004
Ray Optics
282982
An astronomical telescope consists of an objective lens that forms at or very near to its principle focus an image of the object which is
1 real, inverted and reduced
2 real, inverted and magnified
3 virtual, erect and reduced
4 real, erect and reduced
Explanation:
A: Image formed by objective of astronomical telescope is real, inverted and reduced.
SCRA-2014
Ray Optics
282983
For a person having hypermetropia
1 the near point shifts towards the eyes
2 the near point shifts away from the eyes
3 the far point shifts towards the eyes
4 the far point shifts away from the eyes
Explanation:
B: For a person having hypermetropia, the near point shifts away from eyes.
