Light Intensity and the Inverse Square Law (HSC SSCE Physics): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is light intensity defined as?
What is light intensity defined as?
Energy per second per unit area
If the distance from a light source is doubled, what happens to the intensity?
If the distance from a light source is doubled, what happens to the intensity?
Becomes one-quarter
If the distance from a light source is tripled, the intensity becomes what fraction?
If the distance from a light source is tripled, the intensity becomes what fraction?
One-ninth
Which formula correctly relates intensities at two distances from the same source?
Which formula correctly relates intensities at two distances from the same source?
If the power of a light source is doubled, what happens to intensity at any distance?
If the power of a light source is doubled, what happens to intensity at any distance?
Doubles
At from a source, . What is at ?
At from a source, . What is at ?
The inverse square law also applies to which of the following?
The inverse square law also applies to which of the following?
Gravitational and electrostatic forces
What graph should show a linear relationship to verify the inverse square law?
What graph should show a linear relationship to verify the inverse square law?
versus
At distance from a point source, light is distributed over what surface area?
At distance from a point source, light is distributed over what surface area?
Earth is million km from the Sun, Mars million km. Compare sunlight intensity.
Earth is million km from the Sun, Mars million km. Compare sunlight intensity.
Earth receives times more