Question

8. On which factor does the colour of scattered white light depend?
9. Mention the respiratory unit of lungs and excretory unit of kidney,
10. The radius of curvature of a spherical mirror is 20 cm what is its
focal length.​

Answer 1

Answer:

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Explanation:

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Answer 2

Answer:

1. Scattering of the light depends on the wavelength of the light. The light with a higher wavelength scatters less when compared to the light with a lower wavelength.

2. "Alveoli and Nephrons" are the respiratory unit of lungs and excretory unit of the kidney, respectively

3. Radius of curvature (R) = 20 cm

Radius of curvature of a spherical mirror = 2 — Focal length (f)

R= 2f

f= R/2

f = 20 / 2

f = 10

Hence, the focal length of the given spherical mirror is 10 cm