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Assignment I Class X 2018-19

Q1. Which is a converging mirror: convex or a concave mirror?
Q2. What is a relation between focal length and radius of curvature of a convex mirror?
Q3. What is the formula for linear magnification of a spherical mirror?
Q4. What is the angle of incidence when a ray falls normally on a mirror?
Q5. What is a mirror formula?
Q6. Out of convex and concave mirror, the magnification of which mirror is always positive?
Q7. The magnification of a concave mirror is -1. What is the position of the object?
Q8. Which colour of light travels fastest in vacuum?
Q9. When light goes from one medium to another, which of the three parameters frequency,
        wavelength, velocity change?
Q10.  Refractive index of glass w.r.t. air is 3/2 and refractive index of water w. r. t. air is 4/3. What is
         refractive index of glass w.r.t. water?
Q11. What is the speed of light in water of refractive index 4/3?
Q12. Light travels in a medium with a velocity of 2x 108 m/s. what is refractive index of the medium?
Q13. Refractive index of diamond w.r.t. glass is 1.6 and absolute refractive index of glass is 1.5. Find out
         the absolute refractive index of diamond.
Q14. On what factor does the focal length of a spherical mirror depend?
Q15. Why light refracts?
Q16. How does light bend while travelling from denser to rarer medium?
Q17. What are the units of refractive index?