The circulatory system of mammals has a chambered heart.
a. two
b. three
c. four
d. one
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Ответ:
Ответ:
The magnification factor (or dry magnification) indicates the ratio of sizes between the image and the object.
For example, a 1: 2 magnification indicates that the resulting image is half the size of the actual object.
It is a term that is used a lot in macro photography.
Magnification of the lens :
The distance at which the image is formed is obtained from the focal length and the focus distance using the lens equation , where f is the focal distance, D is the focus distance and d is the distance at which the image is formed. :
oneF= 1d+ 1D
The magnification of the lens is defined as the ratio between the image size and the size of the object and is represented with a m . Continuing with the notation in figure 1:
m = hH
The relationship is the same as that between sides D and d, since the gray triangles are similar. Thus, m can be expressed as a ratio of sizes between the image and the object, or as a relationship between image distance and focus distance:hH
m = hH= dD
Using the lens equation, the magnification factor can also be expressed as a function of the focal length f and the focus distance D:
m = fD - f
or depending on the distance of the image:
m = dF- 1
As you can see, the magnification factor is another way of giving the same information as the lens equation; it is simply more useful when what interests us is knowing the size relationship between the image and the object, as is usually the case in macro photography.
The magnification factor is a relative number because it relates two distances.
For example, a typical macro lens you will see indicates 1: 1. This means that the lens is capable of obtaining images the same size as the object; If you take the picture of a 5mm ant, the image of the inverted ant on the sensor will take up 5mm.
Another way to look at it: The distance at which the image is formed is the same as the focus distance.
TRANSLATED ANSWER: (SPANISH)
El factor de magnificación (o magnificación a secas) indica la relación de tamaños entre la imagen y el objeto.
Por ejemplo, una magnificación 1:2 indica que la imagen que se obtiene tiene la mitad de tamaño que el objeto real.
Es un término que se usa mucho en Fotografía macro.
Magnificación de la lente:
La distancia a la que se forma la imagen se obtiene a partir de la distancia focal y la distancia de enfoque mediante la ecuación de lente, donde f es la distancia focal, D la distancia de enfoque y d la distancia a la que se forma la imagen:
1f=1d+1D
La magnificación de la lente se define como la relación entre el tamaño de la imagen y el tamaño del objeto y se representa con una m. Siguiendo con la notación de la figura 1:
m=hH
La relación hH es la misma que la que guardan los lados D y d, pues los triángulos grises son semejantes. Así pues, m se puede expresar como relación de tamaños entre la imagen y el objeto, o como relación entre distancia de la imagen y distancia de enfoque:
m=hH=dD
Usando la ecuación de la lente, el factor de magnificación también se puede expresar en función de la distancia focal f y la distancia de enfoque D:
m=fD−f
o en función de la distancia de la imagen:
m=df−1
Como ves, el factor de magnificación es otra forma de dar la misma información que la ecuación de la lente; simplemente es más útil cuando lo que nos interesa es saber la relación de tamaños entre la imagen y el objeto, como suele ser el caso en fotografía macro.
El factor de magnificación es un número relativo porque relaciona dos distancias.
Por ejemplo, un objetivo macro típico verás que indica 1:1. Esto significa que el objetivo es capaz de obtener imágenes del mismo tamaño que el objeto; si haces la foto de una hormiga de 5 mm, la imagen de la hormiga invertida en el sensor ocupará 5 mm.
Otra forma de verlo: la distancia a la que se forma la imagen es la misma que la distancia de enfoque.