Consider the following statements: 1. a flute of smaller length produces waves of lower frequency. 2. Sound travels in rocks in the form of longitudinal elastic waves only. Which of the statements given above is/are correct?

Explanation: Statement 1 is incorrect. For a flute, which acts as an open pipe, the fundamental frequency (pitch) is inversely proportional to its length. A smaller length means a shorter wavelength and thus a higher frequency (higher pitch), not lower frequency. Statement 2 is incorrect. Sound, being an elastic wave, can travel through solids (like rocks) in two forms: longitudinal waves (P-waves) and transverse waves (S-waves). Longitudinal waves involve particle displacement parallel to the wave propagation, while transverse waves involve displacement perpendicular to it. Therefore, sound does not travel in rocks as longitudinal waves only. Since both statements are incorrect, the correct option is D.