Find the maximum wavelength of photons that can generate carriers by being absorbed in the following semiconductors (respective band gap is given in parentheses): ZnTe (2.39 eV); GaN (3.4 eV); InP (1.34 eV). Are they in the region of ultraviolet, visible or infrared?

For ZnTe  the maximum wavelength is

For GaN the maximum wavelength is

For InP the maximum wavelength is

Explanation:

The explanation is shown on the first uploaded image

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.