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School Physics Quiz : Light


Answer the following questions based on light.

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Multiple choice

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1.

_______ is an instrument used to compare the luminous intensities of two sources of light.

  Photometer

  Camera

  Electroscope

  Half-n-half Clue
 

2.

The partly lighted area of a shadow on the periphery of the totally shaded portion is called the _______

  eclipse

  penumbra

  umbra

  Half-n-half Clue
 

3.

Materials that allow light to pass but through which objects cannot be clearly seen are said to be

  transparent

  opaque

  translucent

  Half-n-half Clue
 

4.

Light from the sun takes about _______ minutes to reach the earth.

  eight

  six

  four

  Half-n-half Clue
 

5.

Illuminance of a surface is proportional to the power of the light source and inversely proportional to the square of the _______.

  area

  distance

  luminous intensity

  Half-n-half Clue
 

6.

_______ is a type of solar eclipse where the moon's shadow covers the sun's center and has a ring of sunlight around it.

  An annular eclipse

  A lunar eclipse

  A helical eclipse

  Half-n-half Clue
 

7.

A _______ beam is one whose rays remain the same distance apart.

  convergent

  divergent

  parallel

  Half-n-half Clue
 


 
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