Class 10 Science | Laws of refraction of light

Science and Technology, Grade 10 · Unit 10

Laws of refraction of light

Semicircular slab · Snell's law · Refractive index

By the end of this lesson you can

🔦

Measure i and r with a semicircular slab

📜

State the two laws of refraction

➗

Find μ from sin i ÷ sin r

🚀

Link μ to speed with μ = c ÷ v

Experiment

Checking the laws with a semicircular slab

DRAW

Draw four quadrants and degree scales on plain paper.

PLACE

Flat face on the x-axis, its midpoint on the origin.

SHINE

Send the beam at different angles, always to the origin.

MEASURE

Measure i and r, then work out sin i ÷ sin r.

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Presenter notes: Today we learn to put a number on how much light bends. From one simple experiment we will find two laws and one very important number, the refractive index.

Laws of refraction of light Presentation

By the end of this lesson you can

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