1.What are the image characteristics of plane mirror? virtual, upright, same size, laterally inverted
2.Draw a simple reflection!
3.An object was placed between 2 plane mirrors that formed 90. Calculate the amount of images that were formed by the mirrors! State some applications of plane mirror in daily life! 3 images
4.The minimum height of a plane mirror needed to show full image of person with height 2 m is 1 m
5.Convex mirror is also called diverging mirror because it diverges rays of light from a point.
6.Concave mirror is also called converging mirror because it converges rays of light to a point.
7.State the image characteristics in concave mirror! (in each zone)
8.State the image characteristics in convex mirror! virtual, upright, reduced
9.Draw the ray diagrams and for object 10 cm high, placed 40 cm in front of concave mirror with focal length 30 cm!
10.Draw the ray diagrams and for object 20 cm high, placed 60 cm in front of convex mirror with focal length 30 cm!
11.An object 4 cm high was placed 3 cm in front of concave mirror with 6 cm of focal length.
a.What is the image distance? 6 cm
b.What is the magnification? 2 x
c.What is the image height? 8 cm
d.What are the image characteristics? virtual, magnified, upright
12.An object 3 cm high was placed 2 cm in front of convex mirror with radius of curvature 8 cm.
a.What is the image distance? -1,3 cm
b.What is the magnification? 2/3 x
c.What is the image height? 2 cm
d.What are the image characteristics? virtual, reduced, upright
13.How far an object must be placed in front of convex mirror so that a virtual image with half size of the object will be formed if the focal length of the convex mirror is 30 cm? 30 cm
14.How far an object must be placed in front concave mirror so that a virtual image with size 4 times bigger than the object will be formed if the focal length of the mirror is 8 cm? 6 cm
15.Describe some applications of concave and convex mirror in daily life! (based on the characteristics of the mirror)
Refraction
16.Light travels fastest in vacuum with a speed 3x10^8 m/s, but when a light entering a new optically denser medium with a certain angle will cause the speed and the wavelength of light will decrease causing the light bends with direction approaching normal, this phenomenon is also called refraction
17.When light travels from less dense to more dense medium it will bend approaching normal.
18.When light travels from more dense to less dense medium it will bend away from normal.
19.How to know refractive index of medium?
20.A ray of light travels from air to a new medium. A man notices when a light enter the new medium at 60° it will be refracted 45° from the normal line in the new medium.
a.Determine whether the new medium is denser or less dense than air! Explain! denser
b.What is the refractive index and the speed of light in the new medium? 1,5 x 6^0,5 x 10^8 m/s
21.Complete the diagrams to show how light are refracted when it passes from one medium to another:
22.Explain why a swimming pool always appears shallower than it really is while if you see an object from water, it will be further!
23.A swimming pool with depth 2,4 m is seen by a man above the swimming pool. If the refractive index of water 4/3 calculate the depth of the pool that seen by the man! 1,8 m
24.Taking the speed of light in air is 3 x 10^8 m/s and the frequency as 10^16 Hz, the frequency of the light and its wavelength in the water with index of refraction 1,3 will be 1,875 x 10^8 m/s and 10^16 Hz
25.What are the differences between total internal refraction and ordinary refraction? TIR moves from more dense to less dense
26.Explain the terms of critical angle!
27.State 2 conditions for T.I.R to occur! moves from more dense to less dense and its angle is more than its critical angle
28.Pictures below shows a ray of light traveling in 2 different medium: air and glass. If the refractive index of glass is 1,52 and critical angle of glass is 42°, then analyze and complete the path (sketch) for every ray of light below (don’t forget to give reason for your answer)
29.Describe some applications of total internal reflection in daily life! binocular, periscope
Lens and Optical Instruments
30.What are the main differences between lens and mirror? lens refracts light. mirror reflects light
31.Convex lens is also called converging lens.
32.Concave lens is also called diverging lens.
33.State the image characteristics in convex lens! (in all zone)!
34.State the image characteristics in concave lens! virtual, reduced, upright
35.An object 8 cm high was placed 60 cm in front of concave lens and formed a virtual image 15 cm from the lens?
a.What is the focal length of the lens? -20 cm
b.What is the power of lens? -5 D
c.What is the magnification? 1/4 x
d.What is the image height? 2 cm
36.An object 4 cm high was placed 30 cm in front of convex lens with 15 cm of focal length.
a.What is the image distance? 10 cm
b.What is the power of lens? 6,67 D
c.What is the magnification? 1/3 x
d.What is the image height? 4/3 cm
37.Find where the object 4 cm high must be placed in front of a 5 D convex lens, to form a real image with 8 cm high! 30 cm
38.A virtual image with size one third of the object was formed by concave lens with power of lens -20 D. What is the object distance? If the image height is 2 cm, what is the object height? 10 cm, 6 cm
39.Draw the ray diagrams and for object 30 cm high, placed 40 cm in front of concave lens with focal length 30 cm!
40.Draw the ray diagrams and for object 20 cm high, placed 60 cm in front of convex lens with focal length 20 cm!
41.Farsightedness / Hyperopia occurs when the image formed behind the retina. To correct the vision convex lens is used.
42.Nearsightedness / Myopia occurs when the image formed in front of the retina. To correct the vision concave lens is used.
43.A boy with myopia eyes has far point in the amount of 200 cm. If he wants to see objects at distant (very far away) what is the focal length and power of lens he must use so a focus image will formed in his retina? -200 cm, -1/2 D
44.A man with hyperopic eyes has near point in the amount of 50 cm. If he wants to read a book at 25 cm what is the focal length and power of lens he must use so a focus image will formed in his retina? 50 cm, 2 D
45.A boy uses eye glasses with power of lens +2,0 D. (i) Determine whether the boy is myopia or hyperopic (ii) What is the near point of the boy, if the glass is used to read book at 25 cm! hyperopia, 50 cm
46.A student sits at the back of the classroom. First he looks to words written in the board from his chair and after that he looks down to checks the words in his notebook. In the process the shape of his lens is changed as shown in the picture below:
Explain why the eyes’ lens changed shape and what cause it? to expand/reduce the focal length of the eyes so that image will form at retina, when it is used to see close object, lens will be thicker, on the other hand, it will be thinner when it is used to see distant object
47.What are the simmilarities between human eye and camera? it will form real images
48.Where the object must be placed to form a clear image in the camera? What are the image characteristics? anywhere except zone 1 to create a real image
49.Where the object must be placed in front of magnifying glass to produce an image with 4 times magnification if the focal lenght of the lens is 4 cm? 3 cm
50.Type of lens used in magnifying glass is convex lens and the object must be placed in zone 1 to produce an image with characteristics virtual, upright and magnified
51.A photocopy machine is commonly used to produce a copy of document either with the same size or smaller or bigger size. To do that the copy machine also uses convex lens to manipulate the image size. If we want to make copy of a document with smaller size from the original document, where must the original document be placed from the lens? (consider the focal length of the convex lens is 50 cm and the size of the paper is equal with A4 paper, 21 cm x 29,7 cm). Explain and prove your answer by calculation and ray diagram! place the object in zone 3
52.Describe the simillarities and differences between compound microscope and astronomical telescope!
53.A microscope produce 200 times total magnification. If the magnifaction of the objective lens is 20 times, what is the magnification of the ocular lens/eyepiece? 10 times
Matter and Atom
For no 54-56, for each of the following statements, state whether it describes a solid, liquid or gas.
54.The particles move very quickly .... gas
55.The particles are quite close together ... liquid
56.The particles are arranged in a fixed pattern... solid
57.Describe the meaning of melting point and boiling point!
58.Below its melting point a substance will take place in...solid...state.
59.Above its boiling point a substance will take place in...gas..state.
60.Atom is consisting of 3 parts, which are:proton, neutron, electrone
61.Nucleus of an atom in consists of 2 parts, which are neutron and proton
For no. 62-65, states the number and type of atoms that make the compounds below:
62.CO2……………………1 atom C and 2 atom O
63.H2O……………………2 atom H and 1 atom O
64.CH4……………………1 atom C and 4 atom H
65.H2SO4………………2 atom H, 1 atom S and 4 atom O
66.Atom that loss or gained electrons is called………ion
For no. 67-71, classifies the type of changes occur in the process below:
67.Burning paper into ash……………………chemical
68.Dissolving salt in the water……physical
69.Ice melts become water …………………physical
70.Raw egg become hardboiled egg…chemical
71.An apple turning brown……………………chemical
72.8O16, how many protons, electrons and neutrons inside it? 8,8,8
73.11Na23, How many protons, electrons and neutrons inside it? 11,11,12
74.Inside Na+, how many protons, electrons and neutrons inside it? 11,10,12
75.17Cl35, How many protons, electrons and neutrons inside it? 17,17,18
76.Inside Cl-, how many protons, electrons and neutrons inside it? 17,18,18
77.What is the atomic and mass number of the Oxygen atom? 8,16
78.Physical changes are also called………………………… reversible
79.Chemical changes are also called………………………… irreversible
80.Two or more atoms with same number of protons but different number of neutrons are called… isotope
81.Type of bonds when atoms are joined together by electrons sharing is called…… covalent bond
82.Type of bonds when atoms are joined together by electrons transfer is called…… ionic bond
No comments:
Post a Comment