Question

you are looking at an object under low power (7x) under a stereoscope. how much bigger is the object overall? it will look 7x bigger because its 7x power magnification. it will look 14x bigger because its 7x bigger in two ways, taller and wider. there is no way to know, it depends on how big the object was when you started out it will look 49x bigger because it will be 7x wider and 7x taller.

Explanation:

Step1: Understand magnification concept

Magnification of 7x means each dimension (length and width) is multiplied by 7.

Step2: Calculate area - change factor

If length and width are both multiplied by 7, the overall size (area) changes by a factor of $7\times7 = 49$. But when we talk about how many - times bigger in a linear sense (not area), for each linear dimension (height, width), it is 7x bigger.

Answer:

It will look 7x bigger because its 7x power magnification.