How can ultrasound be used to detect defects in a metal block?

Subject: General Awareness | Topic: Science | Difficulty: MEDIUM

Options

1. (A) By heating the block with ultrasound
2. (B) By measuring the colour of the metal
3. (C) By observing mass movement within the block
4. (D) By measuring the reflection of waves on internal cracks

Verified Answer

Option (D): By measuring the reflection of waves on internal cracks

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