Reducing the number of cycles in the transmitted pulse has what effect on axial resolution?

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Multiple Choice

Reducing the number of cycles in the transmitted pulse has what effect on axial resolution?

Explanation:
Shorter spatial pulse length enhances axial resolution. Spatial pulse length is the number of cycles in the pulse times the wavelength; fewer cycles mean a shorter pulse length, so echoes from closely spaced depths are more distinctly separated. Lateral resolution depends on beam width, not pulse length, and penetration relates to frequency and attenuation, not the number of cycles alone. So reducing the number of cycles improves axial resolution.

Shorter spatial pulse length enhances axial resolution. Spatial pulse length is the number of cycles in the pulse times the wavelength; fewer cycles mean a shorter pulse length, so echoes from closely spaced depths are more distinctly separated. Lateral resolution depends on beam width, not pulse length, and penetration relates to frequency and attenuation, not the number of cycles alone. So reducing the number of cycles improves axial resolution.

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