alleryWhen a mechanical wave passes from one medium to another, which quantity remains unchanged at the boundary?
AWavelength only
BFrequency only
CSpeed only
DBoth speed and wavelength
Answer & Solution
Correct answer: B. Frequency only
At a boundary, the source fixes the frequency, so frequency remains unchanged.
Since wave speed generally changes with medium, the wavelength changes accordingly through $v=f\lambda$.
**Hence B is correct.**
Keep practising Unit 2B: Friction, Gravitational and Normal Forces
Browse all Unit 2B: Friction, Gravitational and Normal Forces questions for AP Physics 1, or explore more Physics topics.
Related questions
As per your syllabus, when the origin of coordinates is chosen at the centre of mass, whatAs per your syllabus, a rigid body's general motion can be decomposed into which two kindsAs per your syllabus, the CM of a continuous distribution is given by which integral?As per your syllabus, if F_ext on the system is zero, the total linear momentum of the sysAs per your syllabus, the total LINEAR MOMENTUM of a system of particles equals which?As per your syllabus, eqn 6.11, the equation of motion of the centre of mass of a system oAs per your syllabus, the centre of mass of a UNIFORM (homogeneous) symmetric body lies atAs per your syllabus, the centre of mass of THREE equal masses placed at the vertices of a