The ratio of resolving powers of an optical microscope for two wavelengths λ1=4000 A0 and λ2=6000 A0 is:

1. 9:4

2. 3:2

3. 16:81

4. 8:27

Subtopic:  Resolving Power of Optical Devices (OLD NCERT) |
 76%
From NCERT
NEET - 2017
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Given below are two statements: 

Assertion (A): The resolving power of a telescope is more if the diameter of the objective lens is more. 
Reason (R): An objective lens of large diameter collects more light.
  
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.

Subtopic:  Resolving Power of Optical Devices (OLD NCERT) |
From NCERT
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A major breakthrough in the studies of cells came with the development of an electron microscope. This is because:

1. the resolution power of the electron microscope is much higher than that of the light microscope.
2. the resolving power of the electron microscope is 200-350 nm compared to 0.1-0.2 nm for the light microscope.
3. electron beam can pass through thick materials, whereas light microscopy requires thin sections.
4. the electron microscope is more powerful than the light microscope as it uses a beam of electrons that has a wavelength much longer than that of photons.

Subtopic:  Resolving Power of Optical Devices (OLD NCERT) |
 55%
From NCERT
AIPMT - 2006
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The distance of the moon from the earth is 3.8×105 km. The eye is most sensitive to light of wavelength 5500 Å. The minimum separation between two points on the moon that can be resolved by a 500 cm telescope will be:

1. 51 m                         

2. 60 m

3. 70 m                         

4. All the above

Subtopic:  Resolving Power of Optical Devices (OLD NCERT) |
 62%
From NCERT
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The ratio of resolving powers of an optical microscope for two wavelengths λ1=4000 A o and λ2=6000 Ao is:

1. 8:27

2. 9:4

3. 3:2

4. 16:81

Subtopic:  Resolving Power of Optical Devices (OLD NCERT) |
 91%
From NCERT
NEET - 2017
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The resolving power of a microscope can be increased by using:

1.  red light.
2.  blue light.
3.  oil between objective lens and object.
4.  both (2) and (3).

Subtopic:  Resolving Power of Optical Devices (OLD NCERT) |
 67%
From NCERT
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The graph between resolving power and accelerating potential V for an electron microscope is (P is resolving power):

1.    2.   
3.   4.  
Subtopic:  Resolving Power of Optical Devices (OLD NCERT) |
 51%
From NCERT
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Resolving power of a compound microscope:

1.  Depends on the wavelength of light as \(\propto\) λ

2.  Depends on the wavelength of light as \(\propto\) λ2

3.  Depends on the wavelength of light as \(\propto\) 1λ

4.  Depends on the wavelength of light as \(\propto\) 1λ2

Subtopic:  Resolving Power of Optical Devices (OLD NCERT) |
 83%
From NCERT
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Assume that light of wavelength 600 nm is coming from a star. The limit of resolution of telescope whose objective has a diameter of 2 m is:

1. 1.83×10-7 rad

2. 7.32×10-7 rad

3. 6.00×10-7 rad

4. 3.66×10-7 rad

Subtopic:  Resolving Power of Optical Devices (OLD NCERT) |
 69%
From NCERT
NEET - 2020
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The resolving power of a compound microscope will be maximum when:

1. red light is used to illuminate the object.
2. violet light is used to illuminate the object instead of red light.
3. infrared light is used to illuminate the object instead of visible light.
4. the microscope is in normal adjustment.
Subtopic:  Resolving Power of Optical Devices (OLD NCERT) |
 75%
From NCERT
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