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WorksheetsQUIZ 2-PHYSICS 2
Total questions: 17
Worksheet time: 23mins
The principle on which mirror work is
refraction
polarization
reflection
total internal reflection
John's face is 20 cm in front of a concave shaving mirror. If he observes his image to be twice as big and upright. What is the focal length of the mirror?
10 cm
20 cm
30 cm
40 cm
50 cm
A converging lens with focal length of 12 cm produces a 3 cm high virtual image of a 1cm tall object. Which entry is correct?
Image Distance Image Location 8cm same side of lens as object
Image Distance Image Location
8 cm opposite side of lens from object
Image Distance Image Location
12 cm opposite side of lens from object
Image Distance Image Location
24 cm opposite side of lens from object
Image Distance Image Location
24 cm same side of lens from object
Describe fully the image of an object which is 10 cm high and 28 cm from a diverging lens of focal length -7.0 cm.
virtual, upright, smaller, 5.6 cm in front of lens, 2.0 cm high
virtual, inverted, smaller, 9.3 cm in front of lens, 3.3 cm high
virtual,upright, larger, 5.6 cm in front of lens, 20.0 cm high
real, inverted, smaller, 5.6 cm in front of lens, 2.0 cm high
If you wish to take a picture of your image while standing 5 m in front of a plane mirror, for what distance should you set your camera to provide sharpest focus?
10 m
5 m
2 m
2.5 m
A convex spherical mirror has a focal length of -20 cm. An object is placed 10 cm in front of the mirror on the mirror's axis. Where is the image located?
20 cm behind the mirror
6.7 cm in front of the mirror
6.7 cm behind the mirror
20 cm in front of the mirror
The bending of light as it moves from one medium to another with differing indices of refraction is due to a change in what of property of light?
amplitude
speed
period
colour
The speed of light in material A is 1.25 times as large as it is in material B. What is the ratio of the refractive indices, nA/nB, of these materials?
1
1.25
2.5
0.8
Light enters a substance from air at 40° to the normal. It continues through the substance at 25° to the normal. What would be the critical angle for total internal reflection for this substance?
37.6 0
41.10
51.40
20.50
A mirage is formed because of
reflection
refraction
diffraction
interference
A beam of light traveling in air is incident on a slab of transparent material. The incident beam and the refracted beam make angles of 40° and 26° to the normal. What is the speed of light in the transparent material?
1.0 × 108 m/s
2.0 × 108 m/s
2.3 × 108 m/s
3.0 × 108 m/s
Compared to the masses of its separate protons and neutrons, the total mass of a stable nucleus is always
zero
less
greater
same
What is the binding energy per nucleon of 197Au (atomic number = 79)? (The following information regarding atomic masses will be needed: 197Au, 196.966 543 u; hydrogen,
1.007 825 u; neutron, 1.008 665 u; also 1 u = 931.5 MeV/c2)
7.3 MeV
8.3 MeV
7.0 MeV
7.9 MeV
Which of the following statement is not true of the radioactive decay?
Radioactive decay is a random process
Radioactive decay emits an α particle, a β particle or γ rays.
A radioactive nucleus decays immediately to a stable nucleus
A radioactive nucleus decays and changes the numbers of neutrons and protons.
Tritium is radioactive with a half‑life of 12.33 years decaying into 3He with low‑energy electron emission. If we have a sample of 3.00 x 018 tritium atoms, what is its activity in decays/second? (1 year = 3.15 x 107 s)
4.20 x 1010/second
3.69 x108/second
6.64 x107/second
5.35 x109 /second
How long will it take a 4.5 Ci sample of material to reach an activity level of 0.14 Ci if the half-life is 435 years?
1993 years
3245 years
14,478 years
2178 years
The half‑life of radioactive Technetium-99 is 6.0 hours. Find the number of 99Tc nuclei necessary to produce a sample of activity 1.0 µCi. (1 Ci = 3.7x 1010 decays/second)
1.15 x 109
8.15 x 108
2.15 x1010
3.45 x1011
