If a ray refracts between medium 1 and medium 2, having indices of refraction n1 and n2, the ray angles θ1 and θ2 in the two media are related by Snell's law, n1sinθ1=n2sinθ2. This law becomes a central idea in a procedure for analyzing refraction problems, as explained in the following Tactics Box.

True

Explanation:

Smells law states that the ratio of the sine of the angle of incidence to the sine angle of refraction is constant for a given light of the same wavelength and frequency.

( Sine I / sine r ) = constant = ų

Ų = refractive index

So therefore for a path traveled by light with same wavelength and frequency

n1 * sineø1 = n2* sineø2

Where the normal to the surface is used to gauge to gauge the angles that the refracted Ray of light creates at the contact point and n1 and n2 are different mediums.

As seen in the attachment

coil wire, increase current, put iron inside the coil

a high pressure system is a dense air mass that is usually cooler and drier than the surrounding air. a low pressure system is a less dense air mass that is usually wetter and warmer than the surrounding air.

in general, areas that experience high atmospheric pressure also experience fair weather. low pressure systems can cause the formation of clouds and storms. air usually flows from areas of high pressure to areas of low pressure..