Light Worksheet - A-Level - Intermediate

Light worksheet for A-Level / Vocational (Ages 16-18). Intermediate level science practice, aligned to the UK National Curriculum. Print-ready with answer key included.

Science•A-Level / Vocational (Ages 16-18)•Lightintermediate

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Exploring the Science of Light

A-Level Science: Intermediate Difficulty

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Instructions: This worksheet delves into the fascinating topic of light, exploring its properties, behaviours, and applications. Engage with a variety of activities designed to deepen your understanding and analytical skills in the context of light.

Properties of Light

Answer the following questions about the fundamental properties of light. Use diagrams and equations where necessary to support your answers.

1. Describe the dual nature of light, explaining both its wave and particle characteristics.

2. Explain how the speed of light in a vacuum is a fundamental constant of nature.

3. Discuss the concept of light refraction and provide an example of its application.

Calculating Refractive Index

Use Snell's Law to calculate the refractive index of various materials. Show all your workings clearly for each calculation.

1. Calculate the refractive index of a material where the angle of incidence is 30° and the angle of refraction is 20°.

2. A light ray passes from air into glass with an angle of incidence of 45° and an angle of refraction of 28°. Determine the refractive index of the glass.

Experiment Design: Investigating Light Intensity

Design an experiment to investigate how light intensity decreases with distance from a light source. Include a hypothesis, apparatus list, method, and how you would ensure the reliability of your results.

Design your experiment here:

Data Analysis: Light Absorption

Analyse the data provided in the table to understand light absorption by different materials. Answer the questions that follow based on your analysis.

Material	Initial Intensity (lux)	Final Intensity (lux)	Absorption Rate
Glass	1000	800	0.2
Plastic	1000	700	0.3
Water	1000	600	0.4
Metal	1000	500	0.5

1. Which material absorbs the most light?

2. Calculate the average absorption rate.

Critical Essay: Applications of Light

Write a critical essay evaluating the applications of light in modern technology. Discuss at least three different applications and their impacts on society.

Evaluate the applications of light in modern technology. [25 marks]

Problem Solving: Light and Lenses

Solve the following problems related to lenses and their effects on light. Use diagrams to illustrate your solutions where applicable.

1. A converging lens has a focal length of 10 cm. An object is placed 30 cm from the lens. Calculate the image distance and describe the nature of the image formed.

2. An object is placed 15 cm from a diverging lens with a focal length of -10 cm. Determine the image distance and the magnification of the image.

Answer Key

Activity 1: Wave-particle duality ; Speed of light is 299,792,458 m/s ; Example - lenses

Activity 2: 1.54 ; 1.61

Activity 3: Hypothesis and method designed by student

Activity 4: Metal ; 0.35

Activity 5: Essay based on student research

Activity 6: 15 cm, real and inverted ; -6 cm, virtual and diminished