Light labs. Chapter VI review
Answers are for parents and teachers.
1
A mirror turns by 40°. By how many degrees does the reflected ray turn?
80
2
How many seconds does light take for 2 100 000 km (300 000 km/s)?
7
3
F = 30 cm, f = 60 cm. How far is the object in cm (1/d = 1/F − 1/f)?
60
4
Describe in 4 sentences your experiment checking the law of reflection.
Sample: we aimed a torch at a mirror, measured α and β with a protractor and found them equal.
5
Write six key terms of Chapter VI with definitions.
Sample: shadow, reflection, refraction, spectrum, lens, focus.