Log Masuk
JAMB - Physics (2011 - No. 14)
Which of the following types of waves needs a medium for propagation?
sound waves
light waves
radio waves
x - rays
Penjelasan
Sound is the only mechanical wave among the rest which are electromagnetic waves.
Komen (0)
Log Masuk Untuk Mengulas
Iklan
Benarkan javascript memuatkan halaman ini dengan betul
