Question

why the distant objects are seen smaller

Answer 1

✨hey mate! here's your answer!✨

$\red{\boxed{\bold{VISUAL \: ANGLE .}}}$

The $\bf {visual}$ $\bf {angle}$ is the angle a viewed object subtends at the eye, usually stated in degrees of Arc.

It is also called the object's angular size.

$visual \: angle \: = \frac{object \: size}{distance}$

the farther the object, the less the visual angle and smaller the object will be looking.

In fact, the optical instruments like telescope, microscope, works by increasing the visual angle of the object and hence they seems to look big.

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$\blue{\boxed{\bold{hope\: it \: is \: helpful ! }}}$✌️