Sound and light waves are

Sound waves are mechanical waves that propagate through a medium via periodic variations in pressure, involving compressions and rarefactions [1]. In air, sound waves are strictly longitudinal because the particles of the medium oscillate parallel to the direction of wave propagation. Conversely, light is an electromagnetic wave that does not require a medium to travel. Light waves are transverse in nature, meaning the oscillations (of electric and magnetic fields) occur perpendicular to the direction of the wave's travel [2]. While sound can exhibit both longitudinal and transverse components in solids, it remains longitudinal in fluids like air. Therefore, in air, sound and light waves are respectively longitudinal and transverse [1].

Sources

1. [1] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 5: Earths Magnetic Field (Geomagnetic Field) > Why Do Sound Waves Travel Faster In A Denser Medium Whereas Light Travels Slower? > p. 64
2. [2] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 4: Earths Interior > Secondary Waves (S-Waves) > p. 62