Tag: substances which allow light to pass through and those which do not

Questions Related to substances which allow light to pass through and those which do not

What is the colour of a green leaf, when white light passing through a yellow filter is incident on it?

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

  1. Black

  2. Blue

  3. Yellow

  4. Green

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Correct Option: D
Explanation:

Color of an object visible to us is independent of the color of light incident on it. Hence a green leaf will look green even if yellow light is incident on it.

A body which allows almost all the light to pass through it and does not reflect any light is a-

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

  1. transparent body

  2. opaque body

  3. translucent body

  4. polished surface

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Correct Option: A
Explanation:

Objects which allow the light to pass through them completely without any obstruction or reflection are called $ \bf{transparent} $ objects.

Objects which do not allow the light to pass through them are called $\bf{opaque} $ objects.

Objects which allow the light to pass through them partially are called $ \bf{translucent} $ objects.

Polished surfaces are good reflectors of light and do not allow light to pass through it. 

Hence, the correct answer is OPTION A.

A medium which partially allows the light rays to pass through it is called -

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

  1. transparent

  2. opaque

  3. non-luminous

  4. translucent

Show answer
Correct Option: D
Explanation:
Objects or medium which allow the light to pass through them completely without any obstruction are called $ \bf{transparent} $ objects or medium.

Objects or medium which do not allow the light to pass through them are called $\bf{opaque} $ objects or medium.

Objects which do not emit light on their own are called  $ \bf{non-luminous} $ objects.

Objects or medium which allow the light to pass through them partially are called $ \bf{translucent} $ objects or medium.

Hence, the correct answer is OPTION D. 

Glass allows light to pass through it because it is -

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

  1. transparent

  2. opaque

  3. luminous

  4. non-luminous

Show answer
Correct Option: A
Explanation:

Objects which allow the light to pass through them completely without any obstruction are called $ \bf{transparent} $ objects.

Objects which do not allow the light to pass through them are called $\bf{opaque} $ objects.

Objects that give out or emit light of their own are called as $ \bf{luminous} $ objects.

Objects which do not emit light on their own are called $ \bf{non-luminous}$ objects.

Thus, glass allows light to pass through it because it is transparent and doesn't block any light. 

Hence, the correct answer is OPTION A.  

Cellophane paper is an example of -

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

  1. an opaque object

  2. a translucent object

  3. a transparent object

  4. a luminous object

Show answer
Correct Option: C
Explanation:
Objects which do not allow the light to pass through them are called $\bf{opaque} $ objects.

Objects which allow the light to pass through them partially are called $ \bf{translucent} $ objects.

Objects which allow the light to pass through them completely without any obstruction are called $ \bf{transparent} $ objects.

Objects that give out or emit light of their own are called as $ \bf{luminous} $ objects.

Since, cellophane paper allows light to pass through it completely, it is a transparent object. Also, it doesn't emit any light. 

Hence, the correct answer is OPTION C.  

A leaf appears green when observed in sunlight because:

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

  1. It transmits green colour

  2. It absorbs green colour

  3. It disperses all colour, except green

  4. None of these

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Correct Option: D
Explanation:

A leaf appears green in sunlight because it absorbs all the wavelength except green which allows only green color rays to reach us.

Gold is an example of a translucent metal. State whether true or false.

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

  1. True

  2. False

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Correct Option: B
Explanation:

Gold is a metal which is an opaque object as it doesn't allow light to pass through it.

Thin glass is a transparent body. State whether true or false.

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

  1. True

  2. False

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Correct Option: A
Explanation:

Thin glass slab acts as a transparent body as it will create very small shift in the emigrant ray which will be negligible .

Select the odd one out w.r.t. transparency (wood, stone, cement, glass)

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

  1. glass

  2. wood

  3. stone

  4. cement

Show answer
Correct Option: A
Explanation:

It is a transparent body rest all are opaque

Select the odd one out w.r.t. transparency (air, fog, mist, tissue paper)

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

  1. air

  2. fog

  3. mist

  4. tissue paper

Show answer
Correct Option: A
Explanation:

It is a transparent medium rest all are translucent