An ice cube (n = 1.31) has a layer of water (n = 1.33) on it. What is the critical angle for a ray in water trying to enter the ice?

(Unit=deg)

Explanation:

Given that,

The Refractive index of glass is

n(ice) = 1.31

The refractive index of water is

n(water) = 1.33

What is the critical angle?

From water to ice

Critical angle is given as.

Using Snell's Rule.

Sin( θc ) = n1 / n2

for total internal reflection the incident ray is always in the denser medium! So, water is the more denser than ice.

Then, .

Sin( θc ) = n(ice) / n(water)

Sin( θc ) = 1.31 / 1.33

Sin( θc ) = 0.98496

θc = arcSin(0.98496)

θc = 80.05°

The critical angle is 80.05°

answer: d. a cme increases the amount of energy in the solar wind

explanation:

coronal mass ejections, also called cmes, are large clouds of plasma and magnetic field that erupt from the sun. only when the cloud is aimed at earth will the cme hit earth and therefore cause impacts. high-speed solar wind streams come from areas on the sun known as coronal holes.

yup its correct its: c) b b