Study the table given below and answer the questions that follow.
Material Allows light to pass through it Does it form a shadow? Wood No Yes Butter paper Partially Yes Bricks No Yes Glass Yes No Cardboard No Yes Metal No Yes Frosted glass Partially Yes
Objects are categorized as opaque, translucent, and transparent. Which one of these categories do not form a shadow when placed in the path of a source of light?
Study the table given below and answer the questions that follow.
| Material | Allows light to pass through it | Does it form a shadow? |
| Wood | No | Yes |
| Butter paper | Partially | Yes |
| Bricks | No | Yes |
| Glass | Yes | No |
| Cardboard | No | Yes |
| Metal | No | Yes |
| Frosted glass | Partially | Yes |
Objects are categorized as opaque, translucent, and transparent. Which one of these categories do not form a shadow when placed in the path of a source of light?
Formation of shadows by different types of materials:
A: By opaque materials:
- The opaque materials are those which does not allow light to pass through them.
- When an opaque material is placed in the path of the light, light is obstructed by it and a dark region is seen which is known as the shadow.
- Hence, opaque materials form shadows.
Therefore, from the above category wood, brick, cardboard, and metal being opaque in nature are able to form shadows when placed in the path of light.
B: By Translucent materials:
- Translucent materials are those which partially allow the light to pass through them.
- When a translucent material is placed in the path of the light, light is not completely obstructed by it and a faint shadow is formed.
- Hence, translucent materials form faint shadows.
Therefore, from the above category butter paper and frosted glass being translucent in nature are able to form faint shadows.
C: By transparent materials:
- Transparent materials are those which completely allow the light to pass through them.
- When a transparent material is placed in the path of the light, light completely passes through it and there will be no shadow formation.
- Hence, transparent materials do not form shadows.
Therefore, from the above category glass does not form shadows.
Hence, from the above category, there is only one transparent material i.e. glass which does not form shadow.
Formation of shadows by different types of materials:
A: By opaque materials:
- The opaque materials are those which does not allow light to pass through them.
- When an opaque material is placed in the path of the light, light is obstructed by it and a dark region is seen which is known as the shadow.
- Hence, opaque materials form shadows.
Therefore, from the above category wood, brick, cardboard, and metal being opaque in nature are able to form shadows when placed in the path of light.
B: By Translucent materials:
- Translucent materials are those which partially allow the light to pass through them.
- When a translucent material is placed in the path of the light, light is not completely obstructed by it and a faint shadow is formed.
- Hence, translucent materials form faint shadows.
Therefore, from the above category butter paper and frosted glass being translucent in nature are able to form faint shadows.
C: By transparent materials:
- Transparent materials are those which completely allow the light to pass through them.
- When a transparent material is placed in the path of the light, light completely passes through it and there will be no shadow formation.
- Hence, transparent materials do not form shadows.
Therefore, from the above category glass does not form shadows.
Hence, from the above category, there is only one transparent material i.e. glass which does not form shadow.
