Summary Science 2nd.docx

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Radio waves is a EM wave has the longest wavelength The higher the frequency the shorter the wavelength describes how wavelength and frequency related. Microwave has longer λ than both infrared and ultraviolet ray Electric and magnetic fields are perpendicular to each other is the orientation of the components of electromagnetic waves EM waves consists of electric and magnetic waves that are perpendicular to each other Wavelength is inversely proportional to frequency and energy can be inferred about EM wave’s wavelengths, frequencies and energies Virtual image is always upright The parallel light rays after passing through a convex lens will converge at the real focus. The object be placed in relation to the convex lens in order to form an enlarged and inverted image of an object is in between F and 2F Microscope is an optical instrument uses 2 convex lenses of which the objective lens is thicker than the eyepiece to make a small object larger Telescope is an optical instrument uses thinner objective lens than the eyepiece to focus image of a distant object between F and 2F should the specimen be placed in relation to the objective lens so that the first image formed in first/objective lens of the microscope is real, inverted and magnified Motor and generator operate in reverse principle The coil rotates continuously if the a current-carrying-coil when it is placed between the poles of a magnet A suspended magnetized needle is a device can be used to determine the polarity of an unmarked magnet Turbine is the essential part of a generator which is NOT found in an electric motor The best describes the set-up of a transformer is current is decreased in the secondary coil The energy transformation is taking place in a generator is mechanical energy to electrical energy The following factors affect the amount of induced current in a conductor: a. Length or number of turns the coil has b. Relative velocity between the conductor and the magnet c. The amount of current present in the conductor AVR is a device is used to increase or decrease voltage output Electromagnetic induction is the process of generating current in a conductor by a changing magnetic field? Electromagnetic induction is the principle behind transformer The image formed by the plane mirror is reversed left-to-right. In the 2F’ is the object located relative to the lens to produce an image that is of equal size to the object Convex mirror is used in automobiles and trucks to give the driver a wider area but smaller image of traffic behind him Concave mirror can produce an image similar to that of convex lens When NO image was formed is the location of the object is at the focus. The type of mirror do dentists usually use to see clearly the image of our tooth is Concave mirror because it magnifies images The image formed by a concave lens is diminished, upright and virtual

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Radio waves is a EM wave has the longest wavelength The higher the frequency the shorter the wavelength describes how wavelength and frequency related. Microwave has longer λ than both infrared and ultraviolet ray Electric and magnetic fields are perpendicular to each other is the orientation of the components of electromagnetic waves EM waves consists of electric and magnetic waves that are perpendicular to each other Wavelength is inversely proportional to frequency and energy can be inferred about EM wave’s wavelengths, frequencies and energies Virtual image is always upright The parallel light rays after passing through a convex lens will converge at the real focus. The object be placed in relation to the convex lens in order to form an enlarged and inverted image of an object is in between F and 2F Microscope is an optical instrument uses 2 convex lenses of which the objective lens is thicker than the eyepiece to make a small object larger Telescope is an optical instrument uses thinner objective lens than the eyepiece to focus image of a distant object between F and 2F should the specimen be placed in relation to the objective lens so that the first image formed in first/objective lens of the microscope is real, inverted and magnified Motor and generator operate in reverse principle The coil rotates continuously if the a current-carrying-coil when it is placed between the poles of a magnet A suspended magnetized needle is a device can be used to determine the polarity of an unmarked magnet Turbine is the essential part of a generator which is NOT found in an electric motor The best describes the set-up of a transformer is current is decreased in the secondary coil The energy transformation is taking place in a generator is mechanical energy to electrical energy The following factors affect the amount of induced current in a conductor: d. Length or number of turns the coil has e. Relative velocity between the conductor and the magnet f. The amount of current present in the conductor AVR is a device is used to increase or decrease voltage output Electromagnetic induction is the process of generating current in a conductor by a changing magnetic field? Electromagnetic induction is the principle behind transformer The image formed by the plane mirror is reversed left-to-right. In the 2F’ is the object located relative to the lens to produce an image that is of equal size to the object Convex mirror is used in automobiles and trucks to give the driver a wider area but smaller image of traffic behind him Concave mirror can produce an image similar to that of convex lens When NO image was formed is the location of the object is at the focus. The type of mirror do dentists usually use to see clearly the image of our tooth is Concave mirror because it magnifies images The image formed by a concave lens is diminished, upright and virtual

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Concave mirror can produce an image of the same size as the object but real and inverted A light ray strikes the mirror surface and makes an angle of incidence equal to 500 so the angle of reflection is also 500 The position of a real image that can be projected on a screen is inverted TV screen reflects the light regularly The type of EM waves releases the most harmful radiation is Gamma ray because it has the most energy All types of EM radiation are harmful for it affects the living cells of organism.

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Concave mirror can produce an image of the same size as the object but real and inverted A light ray strikes the mirror surface and makes an angle of incidence equal to 500 so the angle of reflection is also 500 The position of a real image that can be projected on a screen is inverted TV screen reflects the light regularly The type of EM waves releases the most harmful radiation is Gamma ray because it has the most energy All types of EM radiation are harmful for it affects the living cells of organism.