Question

In the angle of elevation the observer looks ____ to view the object whereas in the angle of depression he looks ____ to view the object.
A. Up, up
B. Down, down
C. Down, up
D. Up, down

Answer 1

Hint: We will first draw an image with an observer, something above the level of the observer’s eyes and something below the level of the observer’s eyes. Then, mark both the angles and see where they lie, up or down.

Complete step by step answer:
Let us draw a figure as given below. Now refer to the figure:

Here, on the left, we have a point A and for something to look above, we have ball 1 and ball 2 to look down at the ground.
The angle above the point represents the angle of elevation and the angle below the point represents the angle of depression.
We can see that to look at ball 1, we have angles above the level of the point. So, we see that for the angle of elevation, we look upwards that is in the up direction.
Now, for looking at ball 2, we have an angle below the level of the point. So, we see that for the angle of depression, we look downwards that is in the down direction.
Thus, the first blank needs to be filled with up and the second blank needs to be filled with down.

Hence, option (D) is the correct answer.

Note: The students must not forget to draw a rough diagram for their reference for such kinds of questions. Because otherwise, you may get confused and answer wrong.
The angle of elevation is the angle formed between the horizontal line of an observer to the line of sight up to any object.
The angle of depression is the angle formed between the horizontal line of an observer to the line of sight down to any object.