In weather terms.. Visibility
This is known as visibility distance. It refers to how far an object or light source can be seen clearly by an observer.
Moon
Yes, Mars can be seen at night without a telescope. It's a "naked eye object".
An object or feature of a landscape that is easily seen and recognised from a distance
Length, Width, Height, Volume, Mass, Weight
An object seen through a concave lens will appear smaller, upright, and virtual - meaning it will not project a real image on a screen. The image will be on the same side as the object and its characteristics will depend on the distance of the object from the lens.
The near point of the eyes is the closest distance at which an object can be seen clearly without straining the eyes. It is typically around 25 centimeters for a person with normal vision.
An object can be seen when light reflects off of it and enters the eye, triggering signals to the brain. The visibility of an object depends on factors like lighting conditions, the properties of the object (color, transparency), and the abilities of the observer (visual acuity, distance).
The minimum distance between two objects before they are seen as one object is known as the resolution limit or the resolving power of the imaging system. It is the ability to distinguish between two separate objects rather than seeing them as a single entity.
The variable of distance is eliminated when discussing absolute brightness. Absolute brightness specifically refers to the inherent brightness of an astronomical object without the influence of its distance from the observer.
Jupiter is the outer planet that can be seen from Earth without the aid of a telescope. It is the fourth brightest object in the sky and is visible to the naked eye.
It is actually called 'depth perception'. It is the ability to differentiate between objects seen at a distance as to which object is closer to you than the other.