Statement I : Blood drops that strike a target at an angle less than 90º will create elliptical bloodstains and the width and length of an elliptical bloodstain can be used to determine the angle of impact. Statement II : A mathematical relationship exists between the width and length of an elliptical bloodstain.
Both Statement-I and Statement-II are true
Statement I and Statement II both are true option is correct.
Bloodstain pattern analysis rests on the geometry that a spherical drop striking a surface at an oblique angle deforms into an ellipse. The width of the ellipse is fixed by the drop's original diameter, while the length elongates in proportion to the tangent of the incidence angle. This is precisely the mathematical relationship Statement II asserts.
The impact angle is recovered from the classical formula \(\theta = \sin^{-1}\!\left(\dfrac{W}{L}\right)\), where \(W\) is the ellipse width and \(L\) its length. Because Statement II supplies the very geometric law that makes Statement I possible, both statements are correct and coupled.
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