(i) What are the concepts prepared by Galileo?
(ii) List any five properties of light.

(i) Differentiate the eye defects: Myopia and Hypermetropia. (ii) List any five properties of light.

Mention any five chemical properties of alkanes.

Write any five properties of electromagnetic waves.

Light travels from air into glass slab of thickness 50 cm and refractive index 1.5. (i) What is the speed of light in glass? (ii) What is the time taken by the light to travel through the glass slab? (iii) What is the optical path of the glass slab?

What is the purpose of preparation of Red list?

(i) What are the structures involved in the protection of brain? (ii) List out the parasitic adaptation in leech.