A Mars exploration rover deploys a scientific sensor onto a rock to analyze its environment.
The sensor has a mass of 12 kg. The rover's robotic arm lifts the sensor vertically through a height of 0.85 m to position it. The gravitational field strength on Mars is 3.7 N/kg. Calculate the gravitational potential energy gained by the sensor.
The sensor uses a near-infrared laser to perform spectroscopy. The laser emits light with a wavelength of 1.05 × 10-6 m. The speed of light is 3.0 × 108 m/s. Calculate the frequency of the laser light. Give your answer to 2 significant figures.
43 exam-style questions on OCR GCSE Physics Wave behaviour. Each one has a worked solution and a mark scheme showing where the marks go.