🔍 Refraction and Snell's Law
Discover how light bends when it travels between different materials! This quiz explores the fascinating phenomenon of refraction, Snell's law, and the behaviour of light in denser and less dense media. Perfect for understanding why objects appear displaced in water and how optical devices work. **What you'll learn:** - How refraction occurs at boundaries between different media - Apply Snell's law to predict light ray bending - Why light travels at different speeds in different materials - Recognize and understand total internal reflection and critical angles - Real-world applications of refraction in everyday life
Questions in this quiz
Answers hidden — play to find out.
- Question 1
When light travels from air into glass, what happens to the speed of light?
- Question 2
A light ray strikes the boundary between water and air at an angle. The light bends away from the normal line. What can you conclude about this situation?
- Question 3
Snell's law states that the angle of incidence always equals the angle of refraction.
- Question 4
A pencil is partially submerged in water. Why does the pencil appear bent at the water surface when viewed from above?
- Question 5
Which of the following correctly describes the relationship between refractive index and light speed?
- Question 6
A light ray hits the boundary between diamond and air at a steep angle from inside the diamond. The light does not exit the diamond but reflects back inside it. What is this phenomenon called?
- Question 7
Total internal reflection can occur when light travels from air into water.
- Question 8
The critical angle is the angle of incidence at which light traveling in a denser medium hits the boundary with a less dense medium and the refracted angle becomes 90°. What happens if the angle of incidence exceeds the critical angle?
- Question 9
A light ray enters a glass block from air perpendicular to the surface (at 0° to the normal). What is the angle of the refracted ray inside the glass?
- Question 10
According to Snell's law, if light travels from a medium with refractive index 1.5 to a medium with refractive index 1.0, and the incident angle is 30°, the refracted angle will be:
- Question 11
Optical fibres work because of total internal reflection, which keeps light bouncing inside the fibre even when the fibre is bent.
- Question 12
Which scenario would produce the most bending (largest change in direction) when light crosses a boundary?
- Question 13
A rainbow forms when sunlight enters water droplets, refracts, reflects internally, and refracts again as it exits. Why does the light separate into different colours?
- Question 14
When light travels from a less dense medium to a more dense medium, it always bends toward the normal line.
- Question 15
A fish in water looks upward and sees a bright circle of sky surrounded by darkness. What explains this observation?
- Question 16
Why does a magnifying glass magnify objects?
- Question 17
A prism separates white light into a spectrum. This is primarily caused by: