PPSC Physics Full Book With Answers

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PPSC Physics Full Book

Sr. # Questions Answers Choice
1 The resolving power of an instrument increases as the wavelength of light used decreases, the magnifying power will Remain the same Increases Decreases Have no relation between the two
2 When we decrease the diameter of the objective lens of a telescope the resolution of telescope Increases Decreases Remain the same Depends upon the focal length of the lens
3 A direct vision spectroscope is better than a prism spectrometer because it helps in Observing the spectrum without a source Observing the spectrum perpendicular to a source Observing the spectrum in line with the source all of the above
4 In a compound microscope objective lens acts as a projector and eye place as a Compensator Erecting lens Simple microscope lens Turntable
5 Larger the diameter of the objective of a telescope. Greater is its resolving power Lesser is its resolving power Lesser is its magnifying power greater is its magnifying power
6 Human's eye acts like a LASER Mirror Lens Fibre optics
7 Which of the following is a transport optical element with flat polished surfaces that refract light. Monocole Axicon Prism Lens
8 Lenses of what diameter are usually not practical. Less than 1 m Larger than 1m Larger than 5 m Larger than 10 m
9 In optics, which subfield studies the measurement of electromagnetic radiation including visible light. Radiometry Photometry Telemetry Chronometry
10 When a ray of light enters a glass slab from air Its frequency increases Its wavelength increases Neither frequency nor wavelength change Its wavelength decreases
11 Two lenses of focal length 'f' are combined the resultant focal length is f 2f f/2 zero
12 The critical angle will be maximum when light travels from Glass of air Water to air Water to glass Glass to water
13 The final image produced by a microscope is. Real and erect Virtual and erect Real and inverted Virtual and inverted
14 In a magnifying glass, the objective is placed at a distance Less than the focal Between the focal length and twice the focal length Greater than twice the focal length At the focus of the lens
15 The object of a telescope is very large this is to have an image which is. More magnified Of better resolution More bright More clear
16 To get large magnifying power of an astronomical telescope. we should have focal length of eye lens. Small Large Of any value Infinity
17 Michelson used the equation to determine the speed of light. c = 4 fd c = 8fd c =12 fd c = 18 fd
18 A component of the spectrometer which consists of a fixed metallic tube with a coned lens at one end and an adjustable slit is called. Telescope Collimator Tumtable <div>Grating</div>
19 A rod of refractive index 1.42 is immersed in a liquid of refractive index 1.42 the rod will Become invisible appear slightly bent Appear slightly raised Reduce its refractive index
20 What is the magnifying power of a convex lens of focal length 5 cm. 3 5 6 20
21 Monochromatic light passing through a thick prism is. Polarize Disperesed Diffracted <div>Deviated</div>
22 Which phenomenon is responsible formation of shadows. Interference of light Diffraction of light Polarization of light Propagation of light
23 Which parameter is an indication of colour of a star. Weight Distance Sixe Temperature
24 Colour of light is determined by its Amplitude Velocity in air Wavelength State of polarization
25 Which of the following colours of light passes through glass with minimum speed. Green Yellow Red Violet
26 A bi prism consists of. Two parallel glass plates Two acute angled prisms Two obtuse angled prisms Two right angled prisms
27 Which of the following factors determines the resolving power of an instrument. magnification Total length of objective Diameter of objective Refractive index of objective
28 Sunlight can undergo total internal reflection if it enters from Glass to air Air to glass Air to water Water to glass
29 The sun appears elliptical before sunset due to Reflection Refraction Scattering Total internal reflection
30 When of the following colours scatters minimum. Blue Violet Yellow Red
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