Physics, 18.03.2021 02:00 liljobe8973
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Image 15
9 An object is placed in front of a canvex mirror of focal length 15 cm. If the image is 10cm
from the mirror, calculate the object dstance.
A. 30,00cm B. 25.00cm C. 35.00cm D. 40.00 cm
10 An object is placed at infinity in front of a concave minor, Whicre will thc image bc formed
and what is the nature?
A. Principal focus, real, diminished and invented
B. Centre of curvature, real, magniſed and inverted
C. Principal focus, virtual, diminished and crect
D. Centre of curvature, real, diminished and invented
11 Explain what you understand by opaque, transparent and transluccot materials. Give exaraples
of each
12 Explain how a real image can be distinguished from a virtual image.
13 Why is the principal focus of a convex mirror called a virtual focus?
14 A distant object is brought towards a concave spherical mirror. Describe the changes in the
size and nature of the image as the object distance varies from infinity to zero.
Answers: 2
Physics, 21.06.2019 22:30
Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.
Answers: 3
Physics, 22.06.2019 12:00
The sun’s mass is 2.0×10^ 30 kg, its radius is 7.0×10 5 km, and it has a rotational period of approximately 28 days. if the sun should collapse into a white dwarf of radius 3.5×10 3 km, what would its period be if no mass were ejected and a sphere of uniform density can model the sun both before and after?
Answers: 3
Physics, 22.06.2019 12:30
Write a full page that sumerizes thermodynamics it’s from the website visionlearnig
Answers: 1
Physics, 22.06.2019 14:40
On a geologic map, if the contacts between sedimentary rock units form a bull’s-eye pattern of concentric circles, with the youngest unit in the center, the underlying structure is a(n)
Answers: 3
Scre
Image 15
9 An object is placed in front of a canvex mirror of focal length 15 cm. If the...
9 An object is placed in front of a canvex mirror of focal length 15 cm. If the...
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