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The angular diameter of an object is inversely proportional to its distance from the observer?
Yes, that's correct. The angular diameter of an object decreases as its distance from the observer increases. This relationship is based on the formula for angular diameter, which states that the apparent size of an object in the sky depends on both its actual size and its distance from the observer.
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If the distance between us and a star is doubled the apparent brightness is decreased by a factor of four true or false?
True. The apparent brightness of a star is inversely proportional to the square of the distance between the star and the observer. So if the distance is doubled, the apparent brightness will decrease by a factor of four.
What size is an object if the diameter field of view is 4.5mm?
The size of the object would depend on its distance from the observer. The diameter of the field of view refers to the circular area you can see through a microscope or similar device and not the actual size of an object.
Could diameter have an effect on the magnitude of a star?
Yes, the diameter of a star can significantly affect its magnitude. Larger stars tend to have greater luminosity, which can lead to a brighter apparent magnitude when viewed from Earth. This is because a star's magnitude is influenced by both its intrinsic brightness (luminosity) and its distance from the observer. Therefore, a star with a larger diameter, assuming it is also hotter and more luminous, would generally appear brighter in the night sky.
What is the fixed point in the water that you will use for parallax?
The fixed point in the water used for parallax is typically the point on the water's surface directly below the observer's line of sight to an object being measured. This point serves as a reference to determine the angle of elevation or depression from the observer to the object. By measuring the distance between the observer and the fixed point, as well as the distance to the object, one can calculate the object's position using triangulation methods.
What does the earth have that allows the latitude of an observer on earth's surface to be determined by measuring altitude of Polaris?
The earth's axis of rotation is tilted relative to its orbit around the sun, causing Polaris to align with the earth's axis. When an observer measures the altitude of Polaris above the horizon, they can determine their latitude because Polaris' altitude corresponds to the observer's angular distance from the North Pole.
What is the relationship between apparent diameter and distance?
The apparent diameter of an object refers to how large it appears from a given distance, which is influenced by the object's actual size and its distance from the observer. As the distance increases, the apparent diameter decreases, making the object appear smaller. This relationship can be described mathematically using the formula for angular size, where a larger distance results in a smaller angular size for a constant actual diameter. Thus, the two variables are inversely related: greater distance leads to a smaller apparent diameter.
If the distance between us and a star is doubled the apparent brightness is decreased by a factor of four true or false?
True. The apparent brightness of a star is inversely proportional to the square of the distance between the star and the observer. So if the distance is doubled, the apparent brightness will decrease by a factor of four.
Why does light appear dimmer the farther the observer is from the object?
Light appears dimmer the farther the observer is from the object because the intensity of light spreads out over a larger area as it travels, causing the illumination to decrease with distance. This is known as the inverse square law, which states that the intensity of light is inversely proportional to the square of the distance from the source.
How is light intensity like gravity?
The intensity of light from a point source measured by an observer and the magnitude of the forces of gravity between two masses are both inversely proportional to the square of the distance between them. And so is the magnitude of the forces between two electric charges or two electrically-charged objects.
What is the distance from the observer to the launch pad?
The distance is 500feet
What size is an object if the diameter field of view is 4.5mm?
The size of the object would depend on its distance from the observer. The diameter of the field of view refers to the circular area you can see through a microscope or similar device and not the actual size of an object.
What is the distance from point A in the ocean to the horizon?
2 miles.Answer:The distance to the horizon on the ocean is a function of the height of the observation point. In general (and with thanks to Pythagoras) it is:d=(h(D+h))0.5 whered = distance to the horizonD = diameter of the Earthh = height of the observer above sea level
What is path difference?
The path difference is the difference in the physical distance between the two sources to the observer, i.e., the difference in distance travelled from the source to the observer.
How can one determine the angular diameter of an object in the sky?
To determine the angular diameter of an object in the sky, you can use trigonometry. Measure the actual size of the object and its distance from you, then use the formula: Angular diameter = 2 * arctan (object size / (2 * distance)). This will give you the angle in degrees that the object subtends in the sky.
What approximate change in decibels does an observer experience from a sound source if the observer moves to a new location that is 67 percent as far from the source?
We're not sure of the solution, so we'll post the work here, and let otherstear it apart:Sound intensity is proportional to the inverse square of the distance from the source.So the new sound intensity is ( 1/0.67 )2 times the original value.db = 10 log(P2/P1) = 10 log (1/0.67)2 = 20 log (1/0.67) = -20 log (0.67) =+3.479 dBCheck:(all together now . . . everybody sing, dance, and wave your hands in the air)That sounds about right . . . we know that 0.707 is 1/2 sqrt(2),which would produce a change of 3 dB.
How is the apparent size of an object affected by its distance from the observer?
The apparent size of an object decreases as it moves farther away from the observer. This is because the angle that the object subtends at the observer's eye decreases as the distance increases, making the object appear smaller.
How is the size of an object affected by its distance from an observer?
As an object moves farther away from an observer, it appears smaller due to perspective, which causes a decrease in angular size. This change in size is a result of the viewing angle between the observer and the object decreasing with distance.
