Sign Convention for Ray Diagram

Q.

u – object distance

v – image distance

f – focal length

R – radius of curvature

Choose the option which shows correct sign convention?

1. v = – ve, u = – ve, f = – ve, R = + ve, h = + ve, h’ = – ve

2. v = – ve, u = – ve, f = + ve, R = + ve, h = + ve, h’ = – ve

3. v = + ve, u = + ve, f = + ve, R = + ve, h = + ve, h’ = – ve

4. v = – ve, u = – ve, f = – ve, R = – ve, h = + ve, h’ = – ve

Q.

If AB is the object and CD is the image formed. If AP is the object distance and CP is the image distance from the mirror. Then choose the correct sign convention?
$\begin{array}{cc}1.heightofimage=+ve& 2.heightofimage=-ve\\ 3.heightofobject=+ve& 4.heightofobject=-ve\\ 5.AP=+ve& 6.AP=-ve\\ 7.PC=+ve& 7.PC=+ve\end{array}$

1. concave mirror – 1, 3, 5 & 7, plane mirror – 1, 3, 5, 7

2. concave mirror – 2, 3, 6 & 8, plane mirror – 1, 3 , 6 , 7

3. concave mirror – 2, 3, 6 & 8, plane mirror – 1, 3, 6, 8

4. concave mirror – 2, 3, 5, 7, plane mirror – 1, 3, 6,

Q. Magnification produced by concave lens is always greater than 1.

1. True
2. False

Q. For an inverted image, the height is taken to be ________ .

1. positive
2. negative
3. undefined
4. zero

Q.

According to the "New Cartesian Sign Convention" for mirrors, what sign has been given to the focal length of : (i) a concave mirror ? (ii) a convex mirror ?

Q.

According to the "New Cartesian Sign Convention" for mirrors, what sign has been given to the focal length of : (i) a concave mirror ? (ii) a convex mirror ?

Q.

Describe the New Cartesian Sign Convention used in optics. Draw a labelled diagram to illustrate this sign convention.

Q.

According to New Cartesian Sign Convention : (a) focal length of concave mirror is positive and that of convex mirror is negative (b) focal length of both concave and convex mirrors is positive (c) focal length of both concave and convex mirrors is negative (d) focal length of concave mirror is negative and that of convex mirror is positive

Q.

Giving reasons, state the 'signs' (positive or negative) which can be given to the following : (a) object distance (u) for a concave mirror or convex mirror (b) image distances (v) for a concave mirror (c) image distances (v) for a convex mirror

Q.

What is the nature of a mirror having a focal length of, +10 cm ?