Al colocar un objeto delante de una lente convergente se genera una imagen real invertida y de doble tamaño, sabiendo que dicha imagen se forma a 30cm delante de la lente, calcule la distancia focal.
Aumento Lente Convergente

30 cm

Explanation:

To solve this problem, we use the lens equation:

where

f is the focal length of the lens

p is the distance of the object from the lens

q is the distance of the image from the lens

In this problem, we know that

q = -30 cm is the distance of the image from the lens; it is negative because the image is formed in front of the lens, so it is a virtual image

We also know that the size of the image is twice that of the object, so the magnification is 2:

where M is the magnification of the lens. Solving this equation for p,

So, the distance of the object from the lens is 15 cm.

Now we can finally solve the lens equation to find f, the focal length:

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.

wavelegth as in spectrum red oygbiv