The radar used by police to check over speeding vehicles works on the principle of ........

Everyday Science Physics

The radar used by police to check over-speeding vehicles works on the principle of

This questions was previously asked in

CAPF 2020 Paper-1

Raman effect

Induction effect

Doppler effect

Coulomb effect

- Option 1: Raman effect

- Related to the scattering of light.

- Used for studying vibrational and rotational phenomena in molecules.

- Option 2: Induction effect

- Involves inducing electric current in a conductor due to a changing magnetic field.

- Not used in speed detection by radar.

- Option 3: Doppler effect

- Correct answer for radar speed detection.

- Measures change in frequency of waves to determine speed.

- Widely used in police radar to detect speed by analyzing frequency shifts.

- Option 4: Coulomb effect

- Involves forces between charged particles.

- Not relevant to radar speed measurements.

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