You are provided with the following materials
  1. magnifying glass
  2. mirror
  3. stainless steel plate
  4. glass tumbler.
Which of the above materials will you identify as transparent?
(a) (i) and (ii)
(b) (i) and (iii)
(c) (i) and (iv)
(d) (iii) and (iv)

AcademicChemistryNCERTClass 6

Correct answer: (c) (i) and (iv)  

Explanation: Magnifying glass and glass tumbler are transparent as we can see through the glass.

A mirror is coated with aluminium metal or other reflecting material so we can see our image on it, hence it is not transparent. 

The stainless steel plate is not transparent but it has shiny surfaces.

[Extra information:

Transparency: Transparency (or transmission of visible light) is characterized by light transmittance, i.e. the measured percentage of incident light transmitted through a standardized plastic specimen. The higher the transmittance %, the higher the transparency. There are three types of transparency:

Transparent Objects: If you are able to see clearly through an object, it is allowing light to pass through it and is transparent. For example water, clear glass, etc.

Opaque Objects: If we cannot see through an object at all, it is an opaque object. For example a wooden door, wall, etc.

Translucent Objects: There are some objects through which we can see, but not very clearly. Such objects are known as translucent. For example Butter paper, ground glass, etc

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raja
Updated on 10-Oct-2022 13:19:56

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