The speed of a light wave in a certain transparent material is 0.6310.631 times its speed in vacuum, which is 3.00×108 m/s3.00×108 m/s . when yellow light with a frequency of 5.15×1014 hz 5.15×1014 hz passes through this material, what is its wavelength in nanometers

367.57 nm

Explanation:

Given that the speed of the light in certain material is 0.6310 times the speed of light in vacuum.

Speed of light in vacuum = 3×10⁸ m/s

Speed of the light in that material = 0.6310×3×10⁸ m/s = 1.893×10⁸ m/s

The frequency of the light does not change but the wavelength of the light changes with change in the speed when light travels from one medium to another.

Thus, frequency = 5.15×10¹⁴ Hz

Using,

c = frequency × Wavelength

Wavelength = c / frequency = (1.893×10⁸ m/s) / (5.15×10¹⁴ Hz) = 367.57×10⁻⁹ m

Also,

1 nm = 10⁻⁹ m

So, wavelength = 367.57 nm

answer: the exterior temperature of commercial jet planes as they leave the stratosphere and return to the ground increases steadily.

explanation:

the lower most layer of atmosphere is troposphere which extends from 0 to 12 km above the surface of the earth. the temperature initially decreases as distance is increased from the earth's surface. commercial jets fly in lower part of the stratosphere. the stratosphere extends upto 50 km. the temperature in stratosphere starts rising again due to presence of ozone which traps the uv rays.

thus, when the planes leave the stratosphere and return to the ground, the exterior temperature increases steadily.