Lenses – Old is Gold
At what distance from a convex lens should an object be placed on the axis so as to form a real
Photometry- Old is Gold
Why does the illuminance of a surface decrease as it moved away from the light source?
What is the meaning of Luminous
Laws of Motion-Old is Gold
State Newton’s Second Law of Motion.
If action and reaction are always equal and opposite, why don’t they always cancel each other?
Acoustic Phenomena | Old is Gold | Class XII
Acoustic Phenomena
Short
1. How are beats produced? What is beat frequency?
2. What are ultrasonic and infrasonic?
3. Distinguish between ultrasonic and supersonics.
4. How it is that
Magnetic Properties of Materials | Old is Gold | XII
Short Questions
1. What are magnetic domains?
2. What is angle of dip? How does it vary from