Step 3 - Fillin the missing numbers: 21 -3 -10 24 b d
2 answers:
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Answer:
Size of image: 1.8 cm inverted
Magnification of camera: -0.1
Explanation:
Given:
= size of bird = 18 cm
= distance of the bird from the camera = 2 m = 200 cm
= distance of the film from the camera = 20 cm
Assume:
= magnification of the camera
= size of image of the bird
Using sign convention, we have
The hole in the pinhole camera behaves as a convex lens. The other face opposite to the hole face behaves like a film where the image is formed to be seen. So, using the formula of magnification, we have
This means the image of the bird measures 1.8 cm in length where negative sign in the calculation represents that the image formed is inverted.
Hence, the image of the bird on the film is 1.8 cm large.
Now, again using the formula of magnification, we have
Hence, the magnification of the camera is -0.1.
Refer to the diagram shown below.
Let x = distance of the base of the ladder from the base of the hill.
By definition,
sin(75°) = x/15
x = 75*cos(75°) = 3.882 ft
Answer:
The distance between the base of the hill and the base of the ladder is 3.9 ft (nearest tenth)
Let x = distance of the base of the ladder from the base of the hill.
By definition,
sin(75°) = x/15
x = 75*cos(75°) = 3.882 ft
Answer:
The distance between the base of the hill and the base of the ladder is 3.9 ft (nearest tenth)