- Mean velocity
- Average velocity
- Instantaneous velocity
- None
- Work
- Heat
- change in enthalpy
- both a and b
- the energy of a particle always changes
- the restoring force is constant
- restoring force is always directed towardss a fixed point
- velocity of a particle is minimum at the centre of the path
- Visible rays
- Thermal infra-red
- Modulated infra-red
- Radio waves
- 62 × 10²⁰
- 3 × 10¹⁹
- 1.5 × 10²⁰
- 6 × 10¹⁸
- Particle nature of light
- Diffraction
- Interference
- Polarisation
- ¼
- ⅓
- 3
- 4
- Frequency of the wave
- Wave length
- Phase difference
- Amplitude
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