Transparent, opaque and translucent objects - class-VII
transparent, opaque and translucent objects
Questions
Transparent objects:
- do not let light pass through them
- allow light to pass through them
- absorb some amount of light and allow the remaining to pass through them
- reflect all the amount of light falling on them
Water is
- Transparent
- Translucent
- Opaque
- Polymer
Substances that allow light to pass through them are called
- Transparent
- Translucent
- Opaque
- None of these
Transparent objects.
- do not let light to pass through them
- allow light to pass through them
- absorb some amount of light and allow the remaining to pass through them
- reflect all the amount of light falling on them
A substance through which light can pass is called a/an :
- light body
- transparent body
- opaque body
- translucent body
Which of the following body allows only a part of the light to pass through it ?
- oiled paper
- brick
- wood
- air
A thin layer of water is transparent but a very thick layer of water is :
- translucent
- opaque
- most transparent
- completely transparent
Name the body which absorbs all colours.
- Black
- White
- Red
- Yellow
A body which allows most of the light to pass through it is called a :
- transparent body
- opaque body
- translucent body
- light medium
Which of the following is a $non-luminous$ body?
- Fire
- Sun
- Star
- Tree
A substance through which light can pass completely is called a/an
- transparent body
- translucent body
- opaque body
- None of the above
An object looks red when seen through a piece of red glass. What is the actual colour of the object ?
- Red
- White
- Red or green
- Black
Air is not visible because it :
- is a nearly perfectly transparent substance
- neither absorbs nor reflects light
- transmits whole of light
- all of the above are correct
Which of the following is a non-luminous body?
- Fire
- Sun
- Stars
- Earth
A thin layer of water is transparent but a very thick layer of water is
- translucent
- opaque
- most transparent
- more transparent
A body which allows most of the light to pass through it is called a
- transparent body
- opaque body
- translucent body
- none of these
Air is not visible because it
- is nearly perfectly transparent substance
- neither absorbs nor reflects light
- transmits whole of light
- all the above are correct
Which of the following is a transparent?
- Gold
- Glass
- Stone
- Plastic
A cyan colour light ray is passed through a blue filter. What is the colour of the light which comes out through the filter?
- Green
- Cyan
- Yellow
- Blue
What is the colour of a green leaf, when white light passing through a yellow filter is incident on it?
- Black
- Blue
- Yellow
- Green
A body which allows almost all the light to pass through it and does not reflect any light is a-
- transparent body
- opaque body
- translucent body
- polished surface
A medium which partially allows the light rays to pass through it is called -
- transparent
- opaque
- non-luminous
- translucent
Glass allows light to pass through it because it is -
- transparent
- opaque
- luminous
- non-luminous
Cellophane paper is an example of -
- an opaque object
- a translucent object
- a transparent object
- a luminous object
A leaf appears green when observed in sunlight because:
- It transmits green colour
- It absorbs green colour
- It disperses all colour, except green
- None of these
Gold is an example of a translucent metal. State whether true or false.
- True
- False
Thin glass is a transparent body. State whether true or false.
- True
- False
Select the odd one out w.r.t. transparency (wood, stone, cement, glass)
- glass
- wood
- stone
- cement
Select the odd one out w.r.t. transparency (air, fog, mist, tissue paper)
- air
- fog
- mist
- tissue paper
In ........................... lens, all the rays diverge after refraction.
- Concave
- Bi-concave
- Convex
- Bi-convex
An object is transparent if you can see through it clearly.
- True
- False
You can clearly see through a blue-tinted drinking glass.
- True
- False
Wood is an example of opaque object.
- True
- False
You can clearly see through opaque objects.
- True
- False
Which of the following is transparent?
- Stone
- Wood
- Plastic
- Glass
Which of the following is an opaque object?
- Wood
- Glass
- Air
- Vacuum
Opaque objects:
- Allow the light to pass through them
- Do not let the light to pass through them
- Absorb some amount of light and let the remaining to pass through them
- Allows the light from natural sources and rejects if it is from artificial sources