Ray Optics

Question 1

Determine Object and Image.

Answer 1

Intersection of incident ray is object and of reflected ray is image.

Question 2

Number of images

Answer 2

1. if y is even then n=y-1
2. if y= odd then n=y-1 when the object is at the line of bisector, if not then n=y.
3. if y is not equal to I the n = [y].

Question 3

Vector form of laws of reflection

Answer 3

b^= â+ 2cosϴ.ň

Question 4

Mirror Formula

Answer 4

1/f = 1/u + 1/v

Question 5

Transverse/Lateral magnification is given by

Answer 5

-v/u = f/(f-u) = hi/ho

Question 6

Axial magnification is found by (for small objects)

Answer 6

(v/u) ² = [f/(f-u)] ² = Li/Lo

Question 7

what Properties of Image can be interpreted by magnification?

Answer 7

m = negative, Image is inverted
m = positive, Image is erect.
|m| = 1, same size as object
|m| ≻ 1, enlarged image
|m| ≺ 1, diminished image

Question 8

Velocity of image in spherical mirrors

Answer 8

[f/(f-u)] ² . velocity of object