decrease

increases

No change

either increase or decrease

always positive

either negative or positive

always negative

depends on position of object

 $m=\frac{u}{v,}\ ,\ m\ =\ -\frac{u}{v}$  

 $m\ =\ -\frac{u}{v}\ ,\ m\ =\ \frac{u}{v}$  

 $m=\ -\frac{v}{u\ },\ m\ =\ \frac{v}{u}$  

 $m\ =\ \frac{v}{u,},\ m\ =\ -\frac{v}{u}$  

frequency

wavelength

speed

both b and c

concave mirror, convex lens

concave mirror, concave lens

convex mirror, concave lens

convex mirror, convex lens

beyond 2F, diminished, real and inverted

at 2F, same size, real and inverted

between F and P, diminished, real and inverted

beyond 2F, enlarged, real and inverted

it means the size of image is smaller than size of object

It means the size of image is greater than size of object

it means the size of image is same as that of the object

it means the size of object is smaller than the size of image

$f\ =\ 2R$

$f\ =\ \frac{R}{2}$

$f\ =\ \frac{R}{3}$

$R\ =\ 3f$

$\frac{1}{f\ }\ =\ \frac{1}{v}\ -\frac{1}{u}\ ,\ \frac{1}{f}\ =\ \frac{1}{v}\ +\ \frac{1}{u}$

$\frac{1}{f}\ =\ \frac{1}{v}\ +\ \frac{1}{u},\ \frac{1}{f\ }\ =\ \frac{1}{v}\ -\ \frac{1}{u}$

$\frac{1}{f\ }\ =\ \frac{1}{u}-\ \frac{1}{v},\ \frac{1}{f}\ =\ \frac{1}{u}\ +\ \frac{1}{v}$

$\frac{1}{f}\ =\ \frac{1}{u}\ +\ \frac{1}{v},\ \frac{1}{f}\ =\ \frac{1}{u}-\ \frac{1}{v}$

centre of curvature

pole

principal focus

optical centre

equal to the angle of emergence

greater than angle of emergence

less than angle of emergence

equal to the angle of refraction

$n_{21}\ =\ \frac{v_2}{v_1}$

$n_{12}\ =\ \frac{v_1}{v_2}$

$n_{21}\ =\ \frac{v_1}{v_2}$

$n_{21}\ =\ \frac{n_1}{n_2}$