Physics
Grade-10
Easy
Question
The normal is at an angle of ____ degrees with the tangent at the point considered.
Hint:
90
The correct answer is: 90
the normal is a line at right angles to the tangent.
The normal is then at right angles to the curve so it is also at right angles to the tangent.
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A beam of light parallel to the principal axis of a convex mirror appears to diverge from a single point after reflection, at a distance of 56 cm from the pole of the mirror. The focal length of the mirror is ____ cm.
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