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# Unit 3: How telescopes and microscopes work.

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- Reflection and refraction questionsGet 7 of 10 questions to level up!
- Refractive index and the speed of lightGet 3 of 4 questions to level up!

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- Paths of light rays through spherical lensesGet 3 of 4 questions to level up!
- Image formation in spherical lensesGet 3 of 4 questions to level up!

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- Using magnification formula for lensesGet 3 of 4 questions to level up!
- Using the lens formulaGet 3 of 4 questions to level up!
- Convex and concave lensesGet 3 of 4 questions to level up!
- Thin lens formula - virtual objectGet 3 of 4 questions to level up!
- Image formed by multiple lensesGet 3 of 4 questions to level up!

Level up on the above skills and collect up to 560 Mastery points

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- Power of accommodationGet 3 of 4 questions to level up!
- Simple Microscope - qualitativeGet 3 of 4 questions to level up!
- Compound MicroscopeGet 3 of 4 questions to level up!

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- Astronomical TelescopeGet 3 of 4 questions to level up!
- Compound microscope and telescope - qualitativeGet 3 of 4 questions to level up!

Level up on the above skills and collect up to 400 Mastery points

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Level up on all the skills in this unit and collect up to 1,500 Mastery points!