light

Question 1

laws of reflection

Answer 1

1] i=r
2]angle of incidence, reflection and normal lie on the same plane

Question 2

absolute refractive index

Answer 2

n=c/v

Question 3

snells law

Answer 3

sin i / sine r = constant = 2n1

Question 4

Bending tendency
-denser to rarer
-rarer to denser

Answer 4

-bend away from normal
-bend towards normal

Question 5

lens formula

Answer 5

1 / f = 1/v - 1/u

Question 5

unit of power of lens

Answer 5

dioptre

Question 6

mirror formula

Answer 6

1 / f = 1/v + 1/u

Question 7

formula of power of lens

Answer 7

P = 1 / f (meter)

Question 8

magnification

Answer 8

h1 / h2 = v / u

Question 9

image size
m>1
m=1
m<1

Answer 9

-magnified
-same size
-diminished

Question 10

nature of image
(convex mirror)

Answer 10

virtual,erect,diminished

Question 10

nature of image
(concave mirror)

Answer 10

real,inverted,

1)highly diminished
2)diminished
3)same size
4)large
5)highly large

6)magnified(virtual,erect)

Question 10

nature of image
(convex LENS)

Answer 10

real,inverted,

1)highly diminished - infinity
2)diminished - beyond 2f1
3)same size - at 2f1
4)large - b/w 2f1 & f1
5)highly large - at f1

6)magnified(virtual,erect) - b/w f1 & optical centre