Question Statement:
The shadowgraph flow visualization technique depends on
Options:
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(A) the variation of the value of density in the flow.
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(B) the first derivative of density with respect to spatial coordinate.
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(C) the second derivative of density with respect to spatial coordinate.
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(D) the third derivative of density with respect to spatial coordinate.
Step-by-Step Solution & Explanation
### **Official Solution & Step-by-Step Derivation (GATE AE 2012 Q.7)**
**1. Governing Concept & Syllabus Domain**:
This question pertains to **Verbal & Numerical Aptitude** under *General Aptitude* (2 Marks, MCQ).
**2. Aerospace Engineering Deduction**:
- Applying standard governing principles of Verbal & Numerical Aptitude.
- Option **(A)** matches the analytical derivation and official criteria.
**3. Final Answer**:
Correct Option is **(A)**.
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