7.5m/s (2.5 x 3) c = frequency x wavelength
Answer:
It is called a surface wave (rayleigh wave) that transmits its energy with the wind blowing onto its surface.Hope this helps
Julia margaret cameron used a short focal length lens that allowed only a small area of sharp focus. The effect that the lens like this produce would be Less Magnification and Wide Angle of view.
A lens having short focal length will produce Less Magnification and Wide Angle of view.
Short focal length gives a deeper depth of the present field in addition to the wide angle of view. They capture maximally that lies in their front of the camera to the infinity.
A lens with large focal length captures a narrow field band as compared to the one with short focal length.
The lower focal length shows the short depth of focus leading to less magnification.
Short focal length is determined by the radius of curvature of both the curvature of the lens, the medium of the surrounding and the refractive index of the lens given.
Focal length of camera shows how much band the camera is able to capture.
Learn more about Focal length here, brainly.com/question/16188698
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