it has to do with the resolution of the image of the slide obtained...the larger the objective lens value is the greater the resolution it will provide, greater the resolution higher the details.
The image either gets bigger or smaller, depending what objective you switched to.
You have to change the first lens that the light passes through. Microscopes usually have 3 to 6 different lenses of different magnifications that you can rotate around on one built in wheel.
no lens is changed!
The eyepiece
When viewing a specimen through a hand lens, you can see in slightly greater detail than your naked eye, but you may not be able to see micro organisms. With a microscope, you can see things in MUCH greater detail, and you can see micro organisms. With a hand lens, you cannot change the power of magnification, while with a microscope, you can change the power of the magnification. With a hand lens, only one lens is used to magnify an object, while a compound microscope uses two lenses (one in objective lens, one in eyepiece). With a hand lens, you can view a specimen from far away, while an objective lens has to be fairly close to a specimen in order to view it clearly. With a hand lens, you can simply move your hand forward, or backward, to focus on an object. With a microscope, a very complex mechanism is used in order to portray some sort of depth while viewing. This is adjusted by using a coarse, and a fine adjustment knob.
40 because you have to multiply the ocular lens times the objective lens and the ocular lens is almost always 10x i think. Hopefully it is in your case. I know our microscopes are like that. Hope this helps! :)
The objective lens magnifies the specimen, producing a real image that is then magnified by the ocular lens resulting in the final image; The total magnification can be calculated by multiplying the objective lens value by the ocular lens value
To set up a microscope follow these steps:Hold the microscope by its base.Place it near a light source. (Not directly in the sun.)Adjust the mirror until light is reflected up the microscpe. (Check this by looking done the microscope.)Turn the objective lens to its lowest magnification.
depends which microscope ur using..... the strongest (not NASA's) is about 1,000x The definition of magnification power is given by the relationship: Magnification = 250 mm / f Thus, a 25-mm focal-length positive lens would be a 10x magnifier.
no lens is changed!
To determine the magnification of the eyepiece on a microscope take the total magnification for the microscope and divide it by the total magnification of the objective lens. The answer is what the magnification is for the eyepiece.
high lens
Simply, multiply the magnification of the ocular lens times the magnification of the objective lens you have in place.
15 * 30 = 450 ------------
30
15 * 30 = 450 ------------
The ocular lens are 10x magnification. Objective lens are 4x, 10x, 40x, 100x magnification. So once an objective lens is selected, the total magnification would be given by its product with the 10x magnification of the ocular lens. For example, if objective lens selected is 40x, total magnification would be: (10x)(40x)=400x total.
by the objective lens
the power of the ocular lens multiplied by the magnification of the objective lens
it would be 15 times 40 which is 600 times magnification
To determine the total magnification of an object being viewed under a microscope, multiply the magnification of the ocular lens by that of the objective lens.