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Does the lens of an eye work only when an animal is alive?
No, because the brain will stop working after it is dead
Will Nikon 70-210mm lens work on D40X?
Yes but only with manual focus.
What type of lens will produce a virtual image longer in size that of object?
This is possible only with a convex lens but with a condition that the object has to be placed in between the optic centre and principal focus of the lens.
How does a convex lens in your eyes work to make you see things?
It only works when it is open and it can only focus on one object at a time.
What is coarse focus used for?
Coarse focus on a microscope is used only when you are using the lowest objective lens. You use it to get the object magnified mostly. The fine focus is then used to adjust the resolution to the viewer's eyesight.
Can you fit an Olympus lens to a canon EOS camera?
Yes. There are adapters avalable that let you do this. But, you will have to focus manually. [Spelvin adds] In addition, because such adapters generally serve as a spacer between the rear of the lens lens and the camera body, you may lose the ability to focus at infinity.
Will focus soft color contact lens change a dark brown eye?
the answer is no......Focus Soft Colors are enhancers and will only show properly on a natural pale eye color.....
When should you use scanning lens on the microscope?
The scanning lens of a compound microscope is used whenever a new slide is viewed or when the view of the specimen in the field of a higher power lens is lost. Think of it as the "neutral" position for the lens array. The scanning lens has the greatest working distance of the lens group on the microscope and is far enough away from the slide to avoid crunching the slide (and possibly damaging the lens) when attempting to focus. Many microscopes are parfocal, meaning that once you have a focused view of the specimen with the scan lens the image will be in, or very near in, focus when you swivel to a higher power lens. Very important! If you can't find a good view at higher power, or you "lose" the specimen after trying to focus with the fine focus knob only, go back to the scanner lens. Never use the coarse focus with anything but the scanner lens in position. Not doing this is probably the number one reason slides get crunched. And everyone will know because it usually makes an unmistakable sound that reverberates all over the lab.
What is coarse used for?
Coarse focus on a microscope is used only when you are using the lowest objective lens. You use it to get the object magnified mostly. The fine focus is then used to adjust the resolution to the viewer's eyesight.
What do you call an animal when only a few of its kind are still alive?
Such an animal would be considered endangered, or critically endangered if only a handful remain.
How can you tell whether a convex lens will produce a real or virtual image?
The secret is that after refraction through convex lens if the refracted rays converge then it would form a REAL image and if the rays are diverging then it would form a VIRTUALimage.So, when the object is at or beyond the focus (F) of the convex lens then we have only converging refracted rays, hence real imageIf the object lies in between focus (F) and optical centre (O) of the lens, then refracted rays come out diverging and so only virtual images are formed.
Does a 3 inch diameter magnifying glass produce heat?
Only after the concentration of sun radiation.No, it cannot produce any heat, but it can focus all of the solar radiation hitting the lens into a much smaller area.
