Applications of spherical mirrors and curved reflecting surfaces
Concave mirrors
Concave mirrors are used by dentists to magnify teeth during extraction and as a shaving mirror. In both cases,
the mirror forms upright and magnified images. Concave reflectors are also used in projector lamps, solar concentrators and telescopes.
Convex mirror
Convex mirrors can be used in supermarkets to monitor customers’ activities and as driving mirrors in cars and motorcycles. This is because convex mirrors provide a wide field of view compared to a plane mirror.
Wider field of view Narrow field of view
However, a convex mirror used as a driving mirror has one limitation. It forms a virtual diminished image which appears to be further away from the observer than it actually is. This may lead to misjudgment by the observer which can result into accidents.
Moraa orina answered the question on April 8, 2018 at 08:04
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A convex mirror of focal length 9cm produces an image on its axis 6cm from the mirror. Determine the
position of the object.
(Solved)
A convex mirror of focal length 9cm produces an image on its axis 6cm from the mirror. Determine the
position of the object.
Date posted:
April 8, 2018
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Answers (1)
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Determine the position, size and nature of the image of an object 4cm tall placed on the principal axis of a
concave mirror of focal...
(Solved)
Determine the position, size and nature of the image of an object 4cm tall placed on the principal axis of a
concave mirror of focal length 15cm at a distance 30cm from the mirror.
Date posted:
April 8, 2018
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Answers (1)
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The charge stored by a cell A of plate dimensions 0.2m*0.2m is 108000C.
a) What charge is stored in cell B of plate dimensions 0.4m*0.4m?
(Solved)
The charge stored by a cell A of plate dimensions 0.2m*0.2m is 108000C.
a) What charge is stored in cell B of plate dimensions 0.4m*0.4m?
Date posted:
April 7, 2018
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Answers (1)
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What is the capacity of a cell which can supply current of 250 mA for 4 hours?
(Solved)
What is the capacity of a cell which can supply current of 250 mA for 4 hours?
Date posted:
April 7, 2018
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Answers (1)
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Differentiate between conductors and insulators giving examples
(Solved)
Differentiate between conductors and insulators giving examples
Date posted:
April 7, 2018
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Answers (1)
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Charge of 180C flows through a conductor for 3 minutes. Calculate the current flowing through the conductor.
(Solved)
Charge of 180C flows through a conductor for 3 minutes. Calculate the current flowing through the
conductor.
Date posted:
April 7, 2018
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Answers (1)
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If the current in a circuit is 2A, calculate:
a) The charge that crosses a point in the circuit in 0.6s.
b) The number of electrons crossing...
(Solved)
If the current in a circuit is 2A, calculate:
a) The charge that crosses a point in the circuit in 0.6s.
b) The number of electrons crossing the point per second. Take e=1.6*10-19C.
Date posted:
April 7, 2018
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Answers (1)
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State the applications of reflection at plane surfaces
(Solved)
State the applications of reflection at plane surfaces
Date posted:
April 7, 2018
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Answers (1)
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At what angle should two mirrors be inclined to form:a) 17 images?b) 29 images?
(Solved)
At what angle should two mirrors be inclined to form:
a) 17 images?
b) 29 images?
Date posted:
April 7, 2018
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Answers (1)
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State the laws of reflection
(Solved)
State the laws of reflection
Date posted:
April 7, 2018
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Answers (1)
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A lamp of height 6cm stands in front of a pinhole camera at a distance of 24cm. the camera screen is 8cm from the...
(Solved)
A lamp of height 6cm stands in front of a pinhole camera at a distance of 24cm. The camera screen is 8cm
from the pinhole. What is the height of the image of the lamp on the screen?
Date posted:
April 6, 2018
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Answers (1)
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The distance between the pinhole and the screen in a pinhole camera is 20cm. a student uses the camera
to form an image of a...
(Solved)
The distance between the pinhole and the screen in a pinhole camera is 20cm. a student uses the camera
to form an image of a person 4m away. The person’s height is 140cm. what is the height of the image?
Determine the magnification.
Date posted:
April 6, 2018
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Answers (1)
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State the factors affecting thermal conduction in solids
(Solved)
State the factors affecting thermal conduction in solids
Date posted:
April 6, 2018
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Answers (1)
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Explain the anomalous (unusual) expansion of water
(Solved)
Explain the anomalous (unusual) expansion of water.
Date posted:
April 6, 2018
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Answers (1)
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Outline qualities of the liquid to be used in liquid in glass thermometer for the thermometer to be effective
(Solved)
Outline qualities of the liquid to be used in liquid in glass thermometer for the thermometer to be effective.
Date posted:
April 6, 2018
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Answers (1)
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Describe an experiment to demonstrate Brownian motion in air (the smoke cell experiment)
(Solved)
Describe an experiment to demonstrate Brownian motion in air (the smoke cell experiment)
Date posted:
April 6, 2018
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Answers (1)
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Describe an experiment to demonstrate Brownian motion in liquids
(Solved)
Describe an experiment to demonstrate Brownian motion in liquids.
Date posted:
April 6, 2018
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Answers (1)
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Describe an experiment to demonstrate that matter is made up of smaller particles
(Solved)
Describe an experiment to demonstrate that matter is made up of smaller particles
Date posted:
April 6, 2018
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Answers (1)
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A man weighs 900N on earth and 150N on the moon. If the earth’s gravitational field strength is 10N/kg,
determine the moon’s gravitational field strength.
(Solved)
A man weighs 900N on earth and 150N on the moon. If the earth’s gravitational field strength is 10N/kg,
determine the moon’s gravitational field strength.
Date posted:
April 6, 2018
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Answers (1)
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A body weighs 75N on the earth’s surface. Calculate its mass in grams if g= 10 N/kg.
(Solved)
A body weighs 75N on the earth’s surface. Calculate its mass in grams if g= 10 N/kg.
Date posted:
April 6, 2018
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Answers (1)