Awave has a wavelength of 15 mm and a frequency of 7 hertz. what is its speed?

wave speed = frequency × wavelength

This is when:

wave speed (v) is measured in metres per second (m/s)

frequency (f) is measured in Hertz (Hz)

wavelength (λ) is measured in metres (m)

7 x 15 = 105 m / s

answer: the correct answer id option(d).

explanation:

snell's law refraction:

the angle of refraction =

the angle of incidence =

refractive index of air = = 1

refractive index of glycerol = 1.47

from the given options, the most closest answer to 63.72° is 65° of option (d).

1 a

2 b

3 b

4 d

5 d

6 d

explanation: