A uniform tube of length stands vertically with its lower end dipping into water

PHYSICS · Subjective · CBSE · Physics · Waves · Waves

Problem

A uniform tube of length

60\ \text{cm}

stands vertically with its lower end dipping into water. The first two air-column lengths above water are

15\ \text{cm}

and

45\ \text{cm}

when the tube responds to a vibrating fork of frequency

500\ \text{Hz}

. Find the lowest frequency to which the tube will respond when it is open at both ends.