Physics 2020: Light and Atoms Quiz

Assessment Overview

• Assessment focuses on Light and Atoms for 2020 Physics curriculum.
• Duration: 105 minutes with a total of 100 marks.
• Key instruction: Allocate approximately 1 minute per mark for time management.

General Instructions

• Utilize provided equation sheet; no other notes allowed.
• Marks deducted for unclear solutions, incorrect significant figures, or missing definitions.
• Suggested use of diagrams where appropriate to enhance answers.
• Use black or blue pens for written work; sharp dark pencil for graphs and diagrams.

Electromagnetic Waves

• Channel 9 broadcasts from Mt Lofty at a frequency of 191.5 MHz.
• Relation between frequency and wavelength is crucial for calculating electromagnetic wave properties.

Antenna Alignment

• Horizontal alignment of antenna elements is necessary for optimal reception of horizontally polarized signals.

Photons and Energy

• Max Planck introduced concept of energy quantization via photons in 1900.
• Energy of a photon is directly proportional to its frequency.
• Photon energy can also be derived from wavelength and momentum.

Energy Calculations

• Required to calculate energy of a photon with given wavelength (e.g., 565 nm).
• Alternatively, calculate energy of a photon using momentum (e.g., 1.05 × 10⁻²⁷ kg·m/s).

Light Interference

• Light of wavelength 634 nm used in double slit experiment.
• Central maximum observed at point C; path difference critical for analyzing light behavior through slits.