Moving Exam #2

Question 1

What occurs during resonance?

Answer 1

Resonance occurs when a body capable of oscillating is subjected to periodic impulses equal to one of its natural frequencies, causing it to vibrate with a large amplitude.

Question 2

What are the characteristics of a node and an antinode?

Answer 2

Node – close end
Antinode – open end

Question 3

What are the relationships for L1, L3, and L5 in terms of wavelength (λ)?

Answer 3

L1 = 1/4 λ
L3 = 3/4 λ
L5 = 5/4 λ

Question 4

What is the formula for frequency (f) in terms of L and velocity (v)?

Answer 4

f = nν / 4L

Question 5

What is the velocity formula involving γ, R, T, and M?

Answer 5

ν = √(γRT/M)

Question 6

What are the characteristics of images formed by plane mirrors?

Answer 6

Plane mirrors form images that are upright, virtual, the same size as the object, and as far behind the mirror and the object is in front of it.

Question 7

What is the law of reflection for plane mirrors?

Answer 7

The incident ray, reflected ray, and the normal line lie in the same plane. Angle of incidence = angle of reflection.

Question 8

What is the relationship between α and β in plane mirrors?

Answer 8

The α and β have a directly proportional relationship. As α increases, β also increases.

Question 9

What are the two types of spherical mirrors?

Answer 9

Concave and convex.

Question 10

What is the focal point in spherical mirrors?

Answer 10

The focal point is the point where the reflected rays converge.

Question 11

What is focal length in terms of radius of curvature?

Answer 11

Focal length is the distance from the vertex of the concave mirror to the focal point; it is half the length of the radius of curvature.

Question 12

What is the mirror equation?

Answer 12

1/s + 1/s’ = 1/f

Question 13

What type of image forms when s < f in a concave mirror?

Answer 13

Virtual, upright, and enlarged image.

Question 14

What type of image forms when f < s < 2f in a concave mirror?

Answer 14

Real, inverted, and enlarged image.

Question 15

What type of image forms when s > 2f in a concave mirror?

Answer 15

Real, inverted, and diminished image.

Question 16

What type of images do convex mirrors produce?

Answer 16

Convex mirrors only produce virtual and diminished images.

Question 17

What is the characteristic of an inverted image in concave mirrors?

Answer 17

The object must be placed beyond the focal point.

Question 18

What is the characteristic of an image smaller than the object in concave mirrors?

Answer 18

The object must be placed beyond 2f.

Question 19

What are the two types of thin lenses?

Answer 19

Converging lens and diverging lens.

Question 20

What are the characteristics of a converging lens?

Answer 20

A converging lens is thicker at the center than at the rim and converges a beam of parallel light to a real focus.

Question 21

What are the characteristics of a diverging lens?

Answer 21

A diverging lens is thinner at the center than at the rim and diverges a beam of parallel light from a virtual focus.

Question 22

What is the principal focus (F) in thin lenses?

Answer 22

The rays parallel and near the principal axis x are brought to a focus; the focus is real for converging lenses and virtual for diverging lenses.

Question 23

What is the formula for linear magnification (m)?

Answer 23

m = size of image / size of object = s’/s

Question 24

What is the formula for the index of refraction (n)?

Answer 24

n = speed of light in vacuum / speed of light in the medium = c/ν

Question 25

What is Snell’s Law?

Answer 25

nA sin θi = nB sin θr

Question 26

What happens when nA < nB in refraction?

Answer 26

The angle of incidence (θi) is greater than the angle of refraction (θr).

Question 27

What happens when nA > nB in refraction?

Answer 27

The angle of incidence (θi) is lesser than the angle of refraction (θr).

Question 28

What happens to light when its direction is reversed through a glass?

Answer 28

The path of the light remains the same but in the opposite direction. For glass, n=1.50.

Question 29

What do s, s’, and f represent in mirror/lens equations?

Answer 29

s – distance of the object from the mirror/lens
s’ – distance of the image from the mirror/lens
f – focal length of the mirror/lens

Question 30

What is the length if node-to-node and node-to- antinode?

Answer 30

Node-node =1/2
Node-antinode =1/4

Question 31

Give the title and ovjective in activity 6

Answer 31

Activity 6: Resonance. The objective is to verify the lengtg of the air column where resonance occurs

Question 32

What is activity 7? What are the objective?

Answer 32

Activity 7: plane mirrors. To locate the image of the pin formed by a plane mirror and to verify the law of reflection of light. To fetermine experimentallythe relation between the angle of the reflected ray B to the rotated angle a of the mirror

Question 33

What is the name in activity 8 and give its objectives.

Answer 33

Spherical mirrors. To determine tge focal length of the concave mirror and identify the type of images produced by concave and convex mirrors.

Question 34

What is activity 9? What is the objective?

Answer 34

Activity 9 is Thin lenses. Ths aims to measure the focal length of converging and diverging lenses.

Question 35

Give the title and obejective in activity 10

Answer 35

Activity 10: refraction of light. This is to study the bending of light as it enters from another medium and vice versa