Answer
a). By rubbing the circular lip of a thin wine glass with a moist finger, one can make it "sing". This is caused by the glass vibrating in a resonance mode.
b). If water is added to the glass, the air column get shortened.
So, the wavelength will be reduced.
As $v=(lambda)\times f$, if lambda reduces, then f will increase, as v is constant.
Work Step by Step
a). By rubbing the circular lip of a thin wine glass with a moist finger, one can make it "sing". This is caused by the glass vibrating in a resonance mode.
b). If water is added to the glass, the air column get shortened.
So, the wavelength will be reduced.
As $v=(lambda)\times f$, if lambda reduces, then f will increase, as v is constant.
