- #1
Samuelriesterer
- 110
- 0
That is, take the virtual image as the object for a second lens?
Samuelriesterer said:I thought microscopes form the real image from the objective lens, then the viewing lens forms a virtual image from that real image. I was looking for the reverse.
Why not? It happens in your EYE, when you are wearing specs for short sight. or long sight. The description of Real of Virtual image is really only relevant when considering the overall behaviour of an optical system.Samuelriesterer said:That is, take the virtual image as the object for a second lens?
jtbell said:Where is the image?
Samuelriesterer said:##s'_1 = \frac{f_1 s_1}{s_1 - f_1} = \frac{(20)(40)}{40-20} = 40##
##s_2 = (50-40) - s'_1 = 10 - 40 = -30##
##s'_2 = \frac{f_2 s_2}{s_2 - f_2} = \frac{(-20)(-30)}{-20+30} = -60##
jtbell said:What is x for image #1?
jtbell said:I specified the focal length of lens #2 as 20, not -20.
M Quack said:But the rays never get to the first image, because they are intercepted by the second lens first. So if you put a screen at the position of the first image (with the second lens in place) you will not see the image.
In any case, the distinction between real and virtual image is not very helpful.
Samuelriesterer said:it looks like the first image formed by the first lens is real because the object is outside the focal length.
jtbell said:the image is real, as far as that lens is concerned
A real image is an image that is formed by the actual convergence of light rays at a specific point, while a virtual image is an image that is perceived to be formed by the extension of light rays from an object.
No, a real image cannot be formed by a virtual image. This is because a real image is formed by the actual convergence of light rays, while a virtual image is only perceived to be formed by the extension of light rays.
An image is real if it can be projected onto a screen, while a virtual image cannot be projected onto a screen. Additionally, if the image can be seen from different angles, it is most likely a virtual image.
A real image has a positive magnification, meaning it is enlarged compared to the object, while a virtual image has a negative magnification, meaning it is reduced in size compared to the object.
No, a virtual image cannot be captured by a camera. This is because a virtual image is only perceived to be formed by the extension of light rays and does not actually exist in physical space.