TN Phy, Unit - 6, Ray Optics

                        Welcome To




Class : XII
Subject : Physics
Unit : 6
Unit Name : Ray Optics

IMPORTANT QUESTIONS



2 Marks

1. State the laws of refraction (OR) Snells law.

2. What is critical angle and total internal reflection?

3. What is Rayleigh’s scattering?

4. Why does sky appear blue?

5. What is the reason for reddish appearance of sky during sunset and sunrise?

6. Why does clouds appear white?




3 Marks


1. Derive the relation between f and R for a spherical mirror.

2. What is optical path? Obtain the equation for optical path of a medium of thickness d and refractive index n.

3. Obtain the equation for apparent depth.

4. Obtain the equation for critical angle.


5 Marks


1. Derive the mirror equation and the equation for lateral magnification.

2. Describe the Fizeau’s method to determine speed of light.

3. Obtain lens maker’s formula and mention its significance.

4. Derive the equation for angle of deviation produced by a prism and thus obtain the
equation for refractive index of material of the prism.

5. What is dispersion? Obtain the equation for dispersive power of a medium.



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