Which of the following quantities is dimensionless
Gravitational constant
Planck's constant
Power of a convex lens
None
Which of the following quantities is dimensionless
$[G] = [{M^{ - 1}}{L^3}{T^{ - 2}}];\,[h] = [M{L^2}{T^{ - 1}}]$
Power = $\frac{1}{{{\rm{focal length}}}} = [{L^{ - 1}}]$
All quantities have dimensions
Power = $\frac{1}{{{\rm{focal length}}}} = [{L^{ - 1}}]$
All quantities have dimensions
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