An object of 1 cm² face area is placed at a distance of
1.5 m from a screen. How far from the object should
a concave mirror be placed so that it forms 4 cm?
image of object on the screen ? Also, calculate the
focal length of the mirror.
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The first few prime numbers are: 2, 3, 5, 7, 11, 13, 17, 19 and 23, and we have a prime number chart if you need more.
If we can make it by multiplying other whole numbers it is a Composite Number.
Like this:
prime composite
2 is Prime, 3 is Prime, 4 is Composite (=2×2), 5 is Prime, and so on...
Explanation:
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