Choose the correct options.

Luminous flux and radiant flux have same dimensions.

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Luminous flux and luminous intensity have same dimensions.

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Radiant flux and power have same dimensions

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Relative luminosity is a dimensionless quantity.

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Solution

The correct options are
A Luminous flux and luminous intensity have same dimensions.
B Relative luminosity is a dimensionless quantity.
D Radiant flux and power have same dimensions
B.Luminous flux is luminous intensity over a solid angle.
Thus both have dimensions of intensity.
C.Radiant flux or Radiant power is the radiant energy emitted, rreflected, transmitted or received, per unit time.
Thus both have same dimensions.
Relative luminosity is the ratio of two luminosity, it has to be dimensionless.

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Similar questions

Q. Mark out the correct options.
(a) Luminous flux and radiant flux have same dimensions.
(b) Luminous flux and luminous intensity have same dimensions.
(c) Radiant flux and power have same dimensions.
(d) Relative luminosity is a dimensionless quantity.

A source emits light of wavelengths 555 nm and 600 nm. The radiant flux of the 555 nm part is 40 W and of the 600 nm part is 30 W.The relative luminosity at 600 nm is 0.6 . Find (a) the total radiant flux, (b) the total luminous flux, (c) the luminous efficiency.

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