The base ( foundation ) of building is made wider. Why ?
1 answer:
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Answer : The distance of the image from the lens is, -42 cm
The height of the image is, 35 cm
Solution :
First we have to calculate the image distance.
Formula used :
where,
f = focal length = 7 cm
p = object distance = 6 cm
q = image distance = ?
Now put all the given values in the above formula, we get the distance of the image from the lens.
Therefore, the distance of the image from the lens is, 42 cm and the negative sign indicates that the image is virtual.
Now we have to calculate the height of the image.
Formula used :
where,
h = height of object = 5 cm
h' = height of image = ?
Now put all the given values in this formula, we get the height of the image.
Therefore, the height of the image is, 35 cm and the negative sign indicates that the image is inverted.
Answer:
Explanation:
Given
Halley's closest distance from sun is
Greatest distance is
Comet's speed at closest approach is
As there is no external torque so angular momentum of comet about the sun is conserved
where
This can be written as
Therefore