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# Grade 12 Physics problem?

A wave moves from 1 medium to another. Given that theta2 = 30 degrees, wavelength2 = 0.5cm, v1 = 3cm/s and the relative index of refraction is 1.3, find v2, wavelength1, theta1, and f.

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- Anonymous1 month ago
Assuming "2" refers to the denser material, then

v2 = 3cm/s * 1.3 = 3.9 cm/s ≈ 4 cm/s

wavelength1 = 0.5cm / 1.3 = 0.38 cm ≈ 0.4 cm

theta1 = arcsin(sin30º * 1.3) = 45º

f = v1/wavelength1 = v2/wavelength2 = 7.8 Hz ≈ 8 Hz

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