Home
Class 12
BIOLOGY
A student wishes to study the cell struc...

A student wishes to study the cell structure under a light microscope having 10X eyepece and 45 X objective. He should illuminate the object by which one of the following colours of light so as to get the best possible resolution

A

Yellow

B

Green

C

Blue

D

Red

Text Solution

AI Generated Solution

The correct Answer is:
To determine which color of light will provide the best possible resolution for studying cell structure under a light microscope, we need to consider the relationship between wavelength and resolution. ### Step-by-Step Solution: 1. **Understand Resolution**: Resolution in microscopy refers to the ability to distinguish two close points as separate entities. The better the resolution, the clearer the image. 2. **Wavelength and Resolution Relationship**: The resolution of a microscope is inversely proportional to the wavelength of light used. This means that shorter wavelengths lead to better resolution, while longer wavelengths result in poorer resolution. 3. **Identify the Wavelengths of the Given Colors**: The colors of light can be arranged according to their wavelengths (from shortest to longest): - Violet (shortest wavelength) - Indigo - Blue - Green - Yellow - Orange - Red (longest wavelength) 4. **Analyze the Options**: The options provided are: - Yellow - Green - Blue - Red From the list above, we can see that: - Blue has a shorter wavelength than green, yellow, and red. 5. **Conclusion**: Since blue light has the shortest wavelength among the given options, it will provide the best possible resolution for studying cell structures under the microscope. ### Final Answer: The student should illuminate the object with **blue light** to achieve the best possible resolution. ---
Promotional Banner

Topper's Solved these Questions

  • CELL:THE UNIT OF LIFE

    AAKASH INSTITUTE ENGLISH|Exercise Assinmer (section -D ) ( Assertion - Reason Type Question )|10 Videos

  • CELL:THE UNIT OF LIFE

    AAKASH INSTITUTE ENGLISH|Exercise Try Yourself|26 Videos

  • CELL:THE UNIT OF LIFE

    AAKASH INSTITUTE ENGLISH|Exercise Assignment(section-B) (subjective type qusetion)|30 Videos

  • CELL CYCLE AND CELL DIVISION

    AAKASH INSTITUTE ENGLISH|Exercise SECTION-D (Assertion-Reason Type Questions )|10 Videos

  • CHEMICAL COORDINATION AND INTEGRATION

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT (SECTION-D)|10 Videos

Similar Questions

Explore conceptually related problems

The limit of resolution of a microscope is the least distance between two point objects which can be seen clearly and distinctively with it. For a naked eye, limit of resolution is about 10^(-4) m or 0.1 mm. The limit of resolution for a microscope is of the order of lambda/2 , where lambda is wavelength of light used. For an optical microscope , using visible light, limit of resolution is "500 nm"/2 =250 mm. This is 400 times smaller than naked eye. So the useful magnification produced by it is 400. Smaller is the limit of resolution, greater is the magnification that can be achieved. By using shorter wavelengths , we can improve resolution. For examination of a microorganism, much higher limit of resolution is needed, the Wave nature of electron provides a means for probes of very small size organisms. An electron beam accelerated by a high potential difference possess a very short wavelength. In an electron microscope magnetic lenses are used to control the path of electrons. The image of object is obtained on a fluorescent screen or on a photographic plate. The electron microscope with its high magnifying power and resolving power , is one of the most indispensable and powerful tool for research in science , medicine and industry. For an electron beam accelerated through a high potential difference V, limit of resolution is proportional to

A circus wishes to develop a new clown act. Fig. (1) shows a diagram of the proposed setup. A clown will be shot out of a cannot with velocity v_(0) at a trajectory that makes an angle theta=45^(@) with the ground. At this angile, the clown will travell a maximum horizontal distance. The cannot will accelerate the clown by applying a constant force of 10, 000N over a very short time of 0.24s . The height above the ground at which the clown begins his trajectory is 10m . A large hoop is to be suspended from the celling by a massless cable at just the right place so that the clown will be able to dive through it when he reaches a maximum height above the ground. After passing through the hoop he will then continue on his trajectory until arriving at the safety net. Fig (2) shows a graph of the vertical component of the clown's velocity as a function of time between the cannon and the hoop. Since the velocity depends on the mass of the particular clown performing the act, the graph shows data for serveral different masses. If the angle the cannot makes with the horiaontal is increased from 45^(@) , the hoop will have to be

A circus wishes to develop a new clown act. Fig. (1) shows a diagram of the proposed setup. A clown will be shot out of a cannot with velocity v_(0) at a trajectory that makes an angle theta=45^(@) with the ground. At this angile, the clown will travell a maximum horizontal distance. The cannot will accelerate the clown by applying a constant force of 10, 000N over a very short time of 0.24s . The height above the ground at which the clown begins his trajectory is 10m . A large hoop is to be suspended from the celling by a massless cable at just the right place so that the clown will be able to dive through it when he reaches a maximum height above the ground. After passing through the hoop he will then continue on his trajectory until arriving at the safety net. Fig (2) shows a graph of the vertical component of the clown's velocity as a function of time between the cannon and the hoop. Since the velocity depends on the mass of the particular clown performing the act, the graph shows data for serveral different masses. The slope of the line segments plotted in figure 2 is a figure constant. Which one of the following physical quantities does this slope represent?

A circus wishes to develop a new clown act. Fig. (1) shows a diagram of the proposed setup. A clown will be shot out of a cannot with velocity v_(0) at a trajectory that makes an angle theta=45^(@) with the ground. At this angile, the clown will travell a maximum horizontal distance. The cannot will accelerate the clown by applying a constant force of 10, 000N over a very short time of 0.24s . The height above the ground at which the clown begins his trajectory is 10m . A large hoop is to be suspended from the celling by a massless cable at just the right place so that the clown will be able to dive through it when he reaches a maximum height above the ground. After passing through the hoop he will then continue on his trajectory until arriving at the safety net. Fig (2) shows a graph of the vertical component of the clown's velocity as a function of time between the cannon and the hoop. Since the velocity depends on the mass of the particular clown performing the act, the graph shows data for serveral different masses. If the clown's mass is 80 kg , what initial velocity v_(0) will have as he leaves the cannot?

Ram is a student of class X in a village school. His uncle gifted him a bicycle with a dynomo fifted in it. He was very excited to get it. While cycling during night, he could light the bulb and see the objects on the road. He, however, did not know how this device works. He asked this questions to his teacher. The teacher considered it an opprtunity to explain the working to the whole class. Answer the following questions : (i) State the principle of working of dynamo. (ii) Write two values each displayed by Ram and his school teacher.

A ray of light travelling with a speed c leaves point 1 shown in figure and is reflected to point 2. The ray strikes the reflecting surface at a distance x from point 1. According to Fermat's principle of least time, among all possible paths between two points , the one actually taken by a ray of light is that for which the time taken is the least (In fact there are some cases in which the time taken by a ray is maximum rather than a minimum). Under what condition is time taken least?

Ravi is a student of mechanical engineering studying in one of the engineering colleges. The other day he saw an old man who suddenly collapsed as he walked out of the house in his neighbourhood. Ravi the emergency ward of the hospital. On getting the medical aid, the old man soon goy recovered. He did not forget to thank Ravi for the timely help he rendered. He was wondering that in his times to get the telephone connection. One had to wait for years whereas these days it takes no time to get the connection. Ravi told him it was all because of the technological progress/deveolpement due to which the simple phenomenon in physics could be easily used. Answer the following questions based on the above : (a) To which phenomenon in physics was Ravi referring to, which made the land line links so easily accessible? (b) What are the essential conditions required to observe this phenomenon ? (c) Write two values displayed by Ravi and the old man in this episode.

A psychologist selected a random sample of 20 students. He grouped them in 10 pairs so that the students in each pair have nearly equal scores in an intelligence test. In each pair, one student was taught by method A and the other by method B and examined after the course. The marks obtained by them after the course are as follows. {:("Pairs","Method A","Method B"),(1,34,38),(2,36,43),(3,28,39),(4,34,45),(5,40,43),(6,30,50),(7,34,52),(8,28,39),(9,32,40),(10,42,42):} Calculate spearman's Rank correlation

Einstein in 1905 proppunded the special theory of relativity and in 1915 proposed the general theory of relativity. The special theory deals with inertial frames of reference. The general theory of relativity deals with problems in which one frame of reference. He assumed that fixed frame is accelerated w.r.t. another frame of reference of reference cannot be located. Postulated of special theory of realtivity ● The laws of physics have the same form in all inertial systems. ● The velocity light in empty space is a unicersal constant the same for all observers. ● Einstein proved the following facts based on his theory of special relativity. Let v be the velocity of the speceship w.r.t a given frame of reference. The obserations are made by an observer in that reference frame. ● All clocks on the spaceship wil go slow by a factor sqrt(1-v^(2)//c^(2)) ● All objects on the spaceship will have contracted in length by a factor sqrt(1-v^(2)//c^(2)) ● The mass of the spaceship increases by a factor sqrt(1-v^(2)//c^(2)) ● Mass and energy are interconvertable E = mc^(2) The speed of a meterial object can never exceed the velocity of light. ● If two objects A and B are moving with velocity u and v w.r.t each other along the x -axis, the relative velocity of A w.r.t. B = (u-v)/(1-uv//v^(2)) One cosmic ray particle appraches the earth along its axis with a velocity of 0.9c towards the north the and another one with a velocity of 0.5c towards the south pole. The relative speed of approcach of one particle w.r.t. another is-

AAKASH INSTITUTE ENGLISH-CELL:THE UNIT OF LIFE -Assignment (section-C) ( Previous Year Qusetion)
  1. Which of the following statement regarding cillia is not correct...

    Text Solution

    |

  2. Organelle involved in modification and routing of newly synthesised pr...

    Text Solution

    |

  3. A student wishes to study the cell structure under a light microscope ...

    Text Solution

    |

  4. In chloroplasts, chlorophyll is present in

    Text Solution

    |

  5. Protein synthesis in an animal cell occurs

    Text Solution

    |

  6. According to widely accepted "Fluid mosaic model" cell membranes are s...

    Text Solution

    |

  7. Genes for cytoplasmic male sterility in plants are located in

    Text Solution

    |

  8. The term 'glycocalyx' is used for

    Text Solution

    |

  9. Why is a capsule advantageous to a bacterium

    Text Solution

    |

  10. Which one of the following organisms is not an example of eukaryotic c...

    Text Solution

    |

  11. Prokaryotic flagella possess

    Text Solution

    |

  12. The site of respirration in bacteria is

    Text Solution

    |

  13. in prokaryotes, the genetic material is

    Text Solution

    |

  14. Algae have cell wall made up of :

    Text Solution

    |

  15. Which one of the following structures between two adjacent cells is an...

    Text Solution

    |

  16. The rough endoplasmic reticulum (RER) in the cells are because of the ...

    Text Solution

    |

  17. Which one of the following statements about cytochrome 450 is wrong?

    Text Solution

    |

  18. which cell organelles is concerned with glycosylation of protein?

    Text Solution

    |

  19. The Golgi apparatus

    Text Solution

    |

  20. Which one the follwing organelles is located near the nuclius and cont...

    Text Solution

    |