Light - Answers

The Year Three Light Answers sheet provides a clear and concise explanation of various concepts related to light. For instance, the term 'luminous' is defined as an object that produces its own light, such as the Sun or a light bulb. The concept of darkness is described as the absence of light. Students are expected to identify luminous and non-luminous objects, reinforcing their understanding of light sources. Furthermore, they are asked to read statements and determine their truthfulness, covering topics like the dangers of looking directly at the Sun, the reflective properties of materials, and the definition of the angle of incidence.

Experimentation with reflection is also explored, where students analyze the results of an experiment measuring the angles of incidence and reflection, learning about the 'Law of Reflection'—the principle that the angle of incidence always equals the angle of reflection. Practical applications of reflection are highlighted, such as the use of cats eyes and reflective road signs for driver safety. The answers sheet delves into the visible spectrum, identifying the sequence of colours and mentioning ultraviolet light as a type of sunlight that can be harmful to humans, along with ways to protect skin and eyes from its effects. Additionally, the properties of materials—opaque, translucent, and transparent—are matched with their definitions, and students learn about the formation and manipulation of shadows, as well as observing the behaviour of shadows at different times of the day using a sundial.