Acandle burns 1.2 m away from a lens with a focal length of 0.4 m. how far away from the lens will an image form?

0.6 m

Explanation:

We can solve the problem by using the lens equation:

where

f is the focal length

p is the distance between the lens and the candle

q is the distance between the image and the lens

In this problem, we have

p = 1.2 m is the distance of the candle from the lens

f = 0.4 m is the focal length

Solving the equation for q, we find

the working equation for the angular size is the product of the physical size and 360 degrees divided by the product of two pi and distance from earth. the minimum size would be 0.559 degrees while the maximum size would be 0.49 degrees. 

the higher the current the higher the mag field around it the higher the influence on the compass