PPSC Physics Chapter 5 Waves and Wave Properties of Light With Answers

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PPSC Physics Chapter 5 Waves and Wave Properties of Light

Sr. # Questions Answers Choice
1 The spectrum of radiation due to transitions between energy levels in an atom, other absorption or emission is called. Atomic spectrum Molecular spectrum Grating spectrum Normal specturm
2 Which of the following is an example band spectra. Black body radiation spectrum Atomic spectra Molecular spectra Anomalous spectrum
3 Which of the following is an example of continuous spectra. Black body radiation spectrum Molecular spectra Atomic spectra <div><br></div><div>grating spectrum</div>
4 A Spectrum of radiation in which the quantity being studied, such as frequency or energy takes on discrete values is called. Continuous spectra Band spectra Discrete spectra Normal spectrum
5 Laser light is considered to be coherent because it consists of. Many wavelengths Uncoordinated wavelengths Coordinated waves of exactly the same wavelength Divergent beams
6 A radiation spectrum which is continuously distributed over a frequency region without being broken up into lines or bands is known as. Continuous spectrum Band spectrum discrete spectra Absorption spectrum
7 Which are different types of emission spectrum Continues spectrum Line spectrum Band spectrum all of the above
8 Which of the following gives discrete emission spectrum. Sun Candle Incandescent filament Mercury vapour lamp
9 Which term best describes the nature of light from modern view point. Waves Rays Particles Photons
10 What is an elementary particle, the basic unit of light and all other form of electromagnetic radiation. Phonon Photon Neutron Proton
11 Which instrument measures properties of light over a specific portion of the electromagnetic spectrum. Photometer Spectrometer Hydrometer Lactometer
12 What is the emission of light by a substance that has observed light or others electromagnetic radiations of a difference wavelength. Fluorescence Illuminance Luminance Incandescence
13 Wave length of a LASER can be sued as a standard of. Angle Time Length Temperature
14 Infrared radiation is also known as Radio signals Heat radiation Magnetic resonance waves RADAR
15 Which form of electromagnetic radiation is used in RADAR. Long wavelength ultraviolet waves short wavelength microwaves short wavelength infrared wave Long wavelength radiowaves
16 Which of the following form of electromagnetic energy has the highest frequency. X rays Game rays Ultraviolet waves Infrared waves
17 Which of the following forms of electromagnetic energy has the longest wavelength. Microwaves Radio waves Infrared waves <sup>Visible light</sup>
18 Which of the following is not electromagnetic . x-rays Gama rays Cathood rays Infrared rays
19 Electromagnetic waves are produced by Charge at rest Accelerated changes Heating a conductor Electroplating
20 Which of the following is electromagnetic wave. X rays Micro waves Light All of these
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