The image of a distant tree is virtual and very small when viewed in a curved mirror. the image appears to be 22.9 cm behind the mirror. what kind of mirror is it?
what is its radius of curvature? (in cm)

45.8 cm

Explanation:

distance of object from the mirror is infinity

distance of image, v = 22.9 cm

The mirror is convex because it is used to see the distant objects and the image formed by the mirror is erect and small.

use mirror formula

Let f be the focal length of the mirror

1 / f = 1 / v + 1 / u

1 / f = 1 / 22.9  + 1 / ∞

f = 22.9 cm

radius of curvature = 2 x focal length

radius of curvature = 2 x 22.9 = 45.8 cm

from 1609, galileo galilei used the recently invented telescope to observe the sun, moon and planets. he saw the mountains and craters of the moon, and for the first time revealed the planets to be worlds in their own right. galileo also provided strong observational evidence that planets orbited the sun.

his discoveries about the moon, jupiter's moons, venus, and sunspots supported the idea that the sun - not the earth - was the center of the universe, as was commonly believed at the time.galileo turned his gaze toward venus, the brightest celestial object in the sky - other than the sun and the moon.

what question you dont ask a question

explanation: