General Knowledge :: Physics
- Which of these is true of all simple machines?
- The plastic material commonly used for making gear wheels is
- The reason for a swimming pool to appear less deep than the actual depth is
- When light passes from one medium to another, this phenomenon of change in its direction is called ________
- Optical fibre works on which of the following principle of light?
- Which colour of light shows maximum deviation when passed through a prism ?
- The sparkling of a diamond is due to
- Stars appear twinkling because of ......... of light.
- Stars in the sky appear to twinkle due to