0
How is the size of an object affected by its distance from an observer?
Wiki User
∙ 14y ago
Its size is not affected in the least by its distance from an observer. If it were, can you possibly imagine the
stress and strain on Brett Favre's body during a game, as he is watched by 60,000 people in the stands, all
at different distances from him ? ! ?
The object's APPARENT size ... i.e. the angle that it subtends at the eye of the observer ... depends on
the observer's distance from it, in the following totally predictable and purely geometrical fashion:
The angle subtended by the object =
arctangent [ (object's dimension perpendicular to the line of sight) divided by (observer's distance) ].
But that's the observer's fault, not the object's.
Wiki User
∙ 14y ago
Wiki User
∙ 15y agomy dick does
Add your answer:
Earn +20 pts
Does the size of an object appear to change as the observer moves closer to or farther away from the object?
Yes, the closer you get the bigger the object will appear but to only the size of the object really is, and the farther away you get the small it will get
What is the size of the shadow and the distance of the object from the light source when a shadow is formed?
If you are using a point light source, the shadow's size is the object's size divided by the distance from the light source to the object multiplied by the distance from the light source to the shadow.
Does the magnitude of a gravitational force depend on the distance of an object from another object or the size and distance of objects from each other?
The mass and distance of an object fom another object
How do shadows change size?
when the distance between the light source and the object changes
Infer whether the size of an object's displacement could be greater than the distance the object travels?
Displacement and distance travelled are synonymous, so my inference would be no, it can't.
What is a formula to calculate the perceived size of an object depending on its distance?
The perceived size is usually measured in terms of the angle subtended by the object at the observation point.Suppose an object of length L, is at a distance D. Then the angular size perceived by an observer who is along the perpendicular bisector of the object, is 2*arctan(L/2D). The formula holds for small divergences from the perpendicular bisector but not significant ones.For example, for a person standing near the base of a tower, the perceived size is arctan(L/D).
Does the size of an object appear to change as the observer moves closer to or farther away from the object?
Yes, the closer you get the bigger the object will appear but to only the size of the object really is, and the farther away you get the small it will get
What factors affect the size of a shadow formed on a screen?
The size of the shadows formed changes if the distance between the object and the screen is also changed. If there is an increase in the distance between the screen and the object, the size of the shadow also increases.
What are the two main characteristics of perspective drawing?
Smaller as their distance from the observer increases.Foreshortened: the size of an object's dimensions along the line of sight are relatively shorter than dimensions across the line of sight.
What is the size of the shadow and the distance of the object from the light source when a shadow is formed?
If you are using a point light source, the shadow's size is the object's size divided by the distance from the light source to the object multiplied by the distance from the light source to the shadow.
What characteristic of a star is determined by its distance from the observer?
It's apparent size, heat, and gravitational force.
Does the magnitude of a gravitational force depend on the distance of an object from another object or the size and distance of objects from each other?
The mass and distance of an object fom another object
What is the small-angle formula?
The small angle formula is used for measuring the distance to a far away object when the actual size and angular size are known, or for finding out the actual size of a faraway object when the distance to the object and angular size are known. In arc-seconds: a = 206265 x D/d where a = the angular size of the object in arc-seconds D = the actual linear size of an object in km d = the distance to the object in km 206265 = the number of arc-seconds in a complete circle divided by 2pi In Radians: a = D/d where a = angular size of object in radians
Does pupil size remain constant while focusing fixed near point object?
Yes, pupil size should not be affected by the focal distance, unless there is a change in the amount of light at that distance. To change focal distance, the lens contracts or expands. The pupil dilates and constricts based upon how much ambient light there is.
Name 3 things that echolocation tells a bat about an object?
the object's distance, size and locatioin
What is the size of something as given by the distance around it?
The distance around an object is called its perimeter. ------------------------------------------------- Or if it is a circle its circumference.
How do shadows change size?
when the distance between the light source and the object changes
