Tag: light and shadow

Quizzes (9) Questions (122)

Questions Related to light and shadow

Multiple choice physics light and shadow substances which allow light to pass through and those which do not transparent, opaque and translucent objects shadows

Name the body which absorbs all colours.

  1. Black

  2. White

  3. Red

  4. Yellow
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Black objects absorb all colours so no light is reflected.

Black really isn't a color. Its the absence of colour. Colours have the colour they do because the named colour is the light colour that they reflect. In other words a red item reflects red light and absorbs all other colours. A blue coloured item reflects blue and absorbs all other colours except blue. So when an item is said to be black, it reflects no colour: therefore all colours are absorbed.

Multiple choice physics light and shadow substances which allow light to pass through and those which do not transparent, opaque and translucent objects shadows

A substance through which light can pass completely is called a/an

  1. transparent body

  2. translucent body

  3. opaque body

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A substance is said to be transparent if light can pass easily through it. Example: glass

A substance is said to be translucent if light passes only partially through it. Example: Butter paper
A substance is said to be opaque if light does not pass through it. so, we can't see through these objects. Example: paper

Multiple choice physics light and shadow substances which allow light to pass through and those which do not transparent, opaque and translucent objects shadows

An object looks red when seen through a piece of red glass. What is the actual colour of the object ?

  1. Red

  2. White

  3. Red or green

  4. Black
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

An object looks red when seen through apiece of red glass, hence the color of object is red as it doesn't matter what color the glass is as the refractive index of the medium is constant, hence the object will look of its original color.

Multiple choice physics light and shadow substances which allow light to pass through and those which do not transparent, opaque and translucent objects shadows

Air is not visible because it :

  1. is a nearly perfectly transparent substance

  2. neither absorbs nor reflects light

  3. transmits whole of light

  4. all of the above are correct
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The absorptive capacity of air is very low, hence it transmits most of the light rays passing through it.