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The Crab Nebula has a diameter of about 10 light years and is at a distance of 6300 light years What angle will this supernova remnant subtend in your sky?
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How does a telecentric lens work?
Telecentric lenses accept ray cones where the "principal ray" is parallel to its mechanical axis because the entrance pupil is placed at infinity. For this reason an orthonormal view of the object (i.e. where no image of the object sides is present) is frequently possible. Standard lenses generate images of different size if a same object changes its distance from the lens. On the other hand objects of different size can be viewed as if they had the same dimension, if they subtend the same viewing angle. In a telecentric system rays get into the optics only with an almost parallel-to-the-axis path. This effect is due to the specific path of the rays: in the case of common optics the geometric information "parallel" to the main optical axis shows a component on the detector plane direction, while in a telecentric lens this perpendicular component is not present at all. You can think as if common lenses would build a correspondence between the 3-dimensional object space and the 2-dimensional detector (image) space: in the case of a telecentric lens the third dimension in object space is not displayed. Some interesting information can be found reading this tutorial online: http://www.opto-engineering.com/telecentric.php
Can you see the Sun from Mercury?
From the orbit of Venus, it would appear considerably larger than from Earth.However, based on the few images sent back from the planet by robot landers, the thick clouds around Venus mean that the Sun is never seen from the surface, except possibly as a brighter area of the sky.
How tall will something appear to be . If we know actual height and distance the object is from you?
If the actual height is h and the distance is d, then it will subtend an angle of arctan(h/d).
How can you add a suffix to the word suburb?
you can do this by making the word suburban or subtend
What is the unit of the angle subtend by an arc are?
cos liverpool are the best team in the world
How many lines of symetery are in an equalateral triangle and where are they?
3 and they subtend from each vertex
If an arc subtend angle of 75 what is angle subtended by it on remaining part of circle?
360 - 75 = 285
What is meant by adjacent sides of a rectangle?
Adjacent sides are sides that are immediately side by side. They are sides that form or subtend an angle.
Can there be congruent arcs on a circle?
Yes, there can be congruent arcs on a circle. Arcs which subtend the same angle at the center are considered as congruent.
Why does parallel Lines appear to meet in the distance?
If they tend to meet in the distance, the lines have been poorly drawn,or you have to be more accurate when making/constructing them :)=============================No !Parallel lines do appear to meet in the distance. That's the whole basis of theperspective effect in drawing.-- Stand on a railroad track, between the rails, and look at the track-bed in thedistance. The two rails appear to draw together as they get farther from you.-- Same if you stand in the middle of a straight road . . . it appears to get narrowerand the curbs draw together as they get farther from you.-- During a meteor shower, the individual meteors are parallel to each other, butto us, they appear to radiate from a single point in the sky.The reason is how our brains judge linear dimensions ... strictly by the ANGLE thatour eyes measure between two points. Anything that fills a smaller angle is perceivedas being a shorter distance. Distant people and airplanes subtend smaller angles andappear to be smaller than nearby ones, although we learn to compensate for that.The angle that parallel lines subtend at our eyes becomes smaller as they get fartheraway, which our brains interpret as a shorter linear distance between them. Turn itaround, and when you draw a picture of parallel lines, you can make them appear torecede in the distance by drawing them sloped toward each other.
What kind of arc lies between the acute central angle?
An acute central angle will subtend an acute arc, or one that is less than 1/4 of the whole circle.
What is the numerical meaning of micrometer?
An instrument, used with a telescope or microscope, for measuring minute distances, or the apparent diameters of objects which subtend minute angles. The measurement given directly is that of the image of the object formed at the focus of the object glass.
How do you find the area of an arc for an example S has an arc in it how do you find the area of an s that has an arc?
A central angle can subtend (form) an arc of a circle. That has an area of 2 x pi x r x (angle A) / 360.
The measure of a major arc is greater than 180?
A circle subtends 360° . Therefore. if the angle subtended at the centre of a circle by an arc is greater than 180° then this is the major arc. By comparison, the minor arc will subtend an angle less than 180°
