Which type of surfaces produces clear images?
Opaque object
Unpolished and non-reflecting surface
Polished and plane reflecting surface
Transparent object
Polished and plane reflecting surface without irregularities and unevenness produces clear images as they cause regular reflection.
What type of surface is needed for the reflection of sound waves?
A- Smooth surface only
B- Smooth and polished surfaces
C-Hard surfaces only
D-Polished and rough surface
Which type of reflection will take place when light is incident on a highly polished surface?
Mark the correct statement:
I) Directions in which the sound is incident and is reflected make equal angles with the normal to the reflecting surface
II) Reflection of sound occurs from a polished surface
III) Reflection of sound occurs from a rough surface