170. According to the figure below, a light ray travels from air into a transparent medium and upon entering medium (2), it deviates $16^\circ$ from the initial direction and refracts. If the wavelength of light in medium 2 is $\frac{1}{\Lambda}\ \mu\text{m}$ of the wavelength of light in air, what is the frequency of that light?
[Figure: A light ray incident at $\Delta r^\circ$ from the normal, passing from air (medium 1) into medium (2)]$$\left(\sin 53^\circ = 0.8,\quad v = 3\times10^8\ \frac{\text{m}}{\text{s}} = \text{speed of light in air}\right)$$
| (1) $6\times10^{14}$ | (2) $6\times10^{15}$ | (3) $4.7\times10^{14}$ | (4) $4.7\times10^{15}$ |