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

Air is not visible because it

  1. is nearly perfectly transparent substance

  2. neither absorbs nor reflects light

  3. transmits whole of light

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

Air is not visible because it is transparent medium. As from definition of transparent medium, their reflectance and emitance is zero , hence it transmits all the light.

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

Which of the following is a transparent?

  1. Gold

  2. Glass

  3. Stone

  4. Plastic
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

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

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

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

Glass is a $\bf{transparent} $ object because it allows light to pass through it completely and doesn't block any light. 
Gold and Stone, on the other hand, are $ \bf{opaque} $ objects. While, Plastic is $ \bf{translucent} $.

Hence, the correct answer is OPTION B. 

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 cyan colour light ray is passed through a blue filter. What is the colour of the light which comes out through the filter?

  1. Green

  2. Cyan

  3. Yellow

  4. Blue
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The color of light coming through a filter is specific to the filter.for example blue filter will allow only blue rays to pass through it.

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

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

  1. Black

  2. Blue

  3. Yellow

  4. Green
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

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

  1. transparent body

  2. opaque body

  3. translucent body

  4. polished surface
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

  1. transparent

  2. opaque

  3. non-luminous

  4. translucent
Reveal answer Fill a bubble to check yourself
D Correct answer
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. 

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

Glass allows light to pass through it because it is -

  1. transparent

  2. opaque

  3. luminous

  4. non-luminous
Reveal answer Fill a bubble to check yourself
A Correct answer
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.  

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

Cellophane paper is an example of -

  1. an opaque object

  2. a translucent object

  3. a transparent object

  4. a luminous object
Reveal answer Fill a bubble to check yourself
C Correct answer
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.