Light in water has a wavelength of and travels at

PHYSICS · Single correct · A Level · Physics · Waves · Waves

Problem

Light in water has a wavelength of

450\,\text{nm}

and travels at

2.25\times10^{8}\,\text{m/s}

. When the same light enters a certain type of glass, its wavelength is measured to be

300\,\text{nm}

. What is the speed of the light in the glass? (a)

2.0\times10^{8}\,\text{m/s}

(b)

7.5\times10^{7}\,\text{m/s}

(c)

1.5\times10^{8}\,\text{m/s}

(d)

3.4\times10^{8}\,\text{m/s}