Question

In an aerial photograph affected by tilt, how does the scale vary across the image?

• A. Scale varies randomly across the photograph
• B. Scale remains constant throughout the photograph
• C. Scale is smaller on the upper side and larger on the lower side
• D. Scale is larger on the upper side and smaller on the lower side

Hint:

Remember: \[ \boxed{ \begin{aligned} \text{Vertical photograph} &\rightarrow \text{Nearly uniform scale} \text{Tilted photograph} &\rightarrow \text{Scale varies continuously} \end{aligned} } \] For a tilted photograph, \[ \boxed{ \text{Upper side: Smaller scale} \qquad \text{Lower side: Larger scale} } \]

Answer 1

The Correct Option is C

Concept: In a tilted aerial photograph, the camera axis is inclined from the vertical, causing the photo scale to vary continuously across the image.

Step 1: Understand the effect of tilt. The ground on the side nearer to the camera appears enlarged, while the farther side appears reduced.

Step 2: Identify the scale variation. Consequently, \[ \boxed{ \text{Scale is smaller on the upper side and larger on the lower side.} } \] Therefore, the correct option is \[ \boxed{(C).} \]