Question

In 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 person and for something to look above, we have a Sun and a ball to look down at the ground.
The angle in green represents the angle of elevation and the angle in red represents the angle of depression.
We can clearly see that to look at the sun, we have angles above the level of the person’s eyes. So, we see that for the angle of elevation, we look upwards that is in the up direction.
Now, for looking at the ball, we have an angle below the level of the person’s eyes. So, we see that for the angle of depression, we look downwards that is in the down direction.
Hence, the first blank needs to be filled with up and the second blank needs to be filled with down.
Hence, we have “In the angle of elevation the observer looks up to view the object whereas in the angle of depression he looks down to view the object”.

Hence, the correct option is (D).

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 observer to the line of sight up to any object. For example, if you are standing on a surface and looking at the Sun as given in the picture above, we will get an angle of elevation.
The angle of depression is the angle formed between the horizontal line of observer to the line of sight down to any object. For example, if you are standing on the roof of your home and looking at the ball or kids or anything random as given in the picture above, we will get an angle of depression.