The from the bowman of the objective lens in the pelican is

The from the bowman of the objective lens in the pelican is the_ The recoupling of the human type is approximately _ mu/L The area of the specimen seen when loci ring through ity mericarps is the_ If a microscope has a 10x ocular and the total it a time is 950x the objective lens in use at that time is_ x Why should the light be different when looking a living (nearly transport) cell? If there focusing in low power only the fine adjustment aced be used to faces the specimen as the higher power the is said to be_ Select the best answer for the following statements The resolution of a microscope is increased by using blue light stopping down the diaphragm lowering the condenser failing the condenser to its highest point Both 01 and 4 are correct The malfunction of an object seen through the 10x objective with a 10x ocular is ten turns twenty times 1000 times None of these are correct The most commonly used ocular is 5x 10x 15x 20x Microscope lenses may be cleaned with lens t

Solution

1. The distance between the bottom of the objective lens and the specimen is called working distance.

2. The resolution of human eye or naked eye is 55-75 micrometers.

3. The area of the specimen seen when looking through the microscope is the field.

4.Ocular lens= 10x

Total magnification= 950x

so, 950x= 10x X objective lens

objective lens= 95x

5. Light should be dimmed when seen through the living cells because it may damage the cells.

6. If after focussing a low power only the fine adjustment need to be used to focus the specimen at the higher power, the microscope is said to be PAR FOCAL

Multiple choice

1. The resolution of microscope is increased by using blue light filter and rising the condenser to its highest point. Purpose of the condenser lens is to focus the light on to the specimen.Lowering the condenser demnishes the illumination and rising will increase the illumination.

2. Total magnification= Objective lens x Ocular lens

so, for 10x objective lens and 10x ocular lens total magnification= 10x X10x

= 100x

so, answer is 5. None of the above.

3. The most commonly used ocular is 10x. because it allow for highest magnification. So answer is 2.

4. The microscope lenses may be cleaned with lens tissue. Because dust formed on the lens needed to be removed to give the clear image. And we can also some solvents like alcohol, ether and rubber bulbs. So answer is 1.

5. When changing from low power to high power it is necessary to close the diapharm. so answer is 2. when close the diapharm resolution is less but depth of field is more.

Completion

1. Three lens systems in a compound microscope are

i) Eye piece or ocular lens

ii) Objective lens

iii) Condenser lens

2. The characterstic of a microscope that enables you to switch from one objective to another without altering the focus is called par focal.

3. In general, condenser should kept at as low as posiible to prevent damage to the lower lens.

True- false

1. True. Eye pieces had simple construction and can easily be removed to clean the lenses.

2. False. Lenses should clean with lens tissue paper especially made for microscopic lenses.

3. True. High- dry is 400x lens. oil immersion is a 100x lens. it should maintain distance between lens and specimen to avoid damage to the lens and to the specimen.

4. False. oil immersion used for when the object shows the low resolution with objective lens. so it not necessary to use low magnification lens before the oil immersion.

5.True. Working distance is the distance between the objective lens and the specimen.so its true.

6. True. oil immersion refractive index is 1.515 and glass is 1.52.

7. True. Generally oil immersion used when the object shows the low resolution with the objective lens and to decrease the light refraction.

8. True. Blue light filter gives better resolution than the white light.