Physics
Assertion (A) : Ultraviolet radiations are scattered more as compared to the microwave radiations.
Reason (R) : Wavelength of ultraviolet radiation is more than the wavelength of microwave radiation.
- Both A and R are true.
- A is true but R is false.
- A is false but R is true.
- Both A and R are false.
Related Questions
A force ‘F’ moves a load from A to C as shown in the figure below. For the calculation of the work done, which of these lengths would you use as the displacement?
- 3m
- 4m
- 5m
- 7m
A radioactive nucleus containing 128 nucleons emits a β – particle. After β – emission the number of nucleons present in the nucleus will be :
- 128
- 129
- 124
- 127
When the stem of vibrating tuning fork is pressed on a table, the tabletop starts vibrating. These vibrations are definitely an example of:
- resonance
- natural vibrations
- forced vibrations
- damped vibrations
Which of the following is a class III lever?
- Pair of scissors
- Wheelbarrow
- Crowbar
- Human forearm