Question

28. Classify the following into materials having lustre (shine) and those having no lustre (no shine)
Gold pendant, Wooden table, Sand, Aluminium sheet, Glass mirror, Sheet of paper, Leather sota, Brass door
handle, Stainless steel tumbler, Jute bag.​

Answer 1

Lustre- gold pendant, aluminium sheet, glass mirror, brass door handle, stainless steel tumbler

Non lustrous - wooden table, sand, sheet of paper, leather sofa, jute bag

Answer 2

Classification of the above given materials:

• Gold pendant: Lustrous
• Wooden table: Non-lustrous
• Sand: Non-lustrous
• Aluminium sheet: Lustrous
• Glass mirror: Lustrous
• Sheet of paper: Non-lustrous
• Leather sofa: Non-lustrous
• Brass handle door: Lustrous
• Stainless steel tumbler: Lustrous
• Jute bag: Non-Lustrous

   Lustrous materials are those that can shine on their own due to their property of reflecting light from its surface. They have a smooth surface to reflect the light. Most of the metals and mirror are lustrous in nature.

   Non-lustrous materials are those that are not smooth in texture and cannot reflect light from their surface like plastic, wood, leather etc.