Question

4 rules for constructing Ray diagrams...
(it should be from NCERT textbook)

Answer 1

Rules are:
1. A ray through the centre of curvature which strikes the mirror normally and is reflected back along the same path.
2. A ray parallel to principal axis after reflection either actually passes through the principal focus F or appears to diverge from it.
3. A ray passing through the principal focus F or a ray which appears to converge at F is reflected parallel to the principal axis.
4. A ray striking at pole P is reflected symmetrically back in the opposite side.


hope the points will help u to construct ray diagrams..☺

Answer 2

Heat is the form of energy that is transferred between systems or objects with different temperatures (flowing from the high-temperature system to the low-temperature system). Also referred to as heat energy or thermal energy. Heat is typically measured in Btu, calories or joules