PPSC Physics Full Book With Answers

image
image
image

PPSC Physics Full Book

Sr. # Questions Answers Choice
1 The deflection image due to oblique centric rays failing on the lens is called. Coma Spherical aberration Astigmatism Curvature of image field
2 The variation of focal length of a lens when we pass from the central portion to periphery is called. Coma Astigmatism Spherical aberration Chromatic aberration
3 Dispersive power of a prism depends upon the wavelength of the light used and is More for large wavelengths Less for large wavelengths More for small wavelengths Less for small wavelengths
4 Which term is used for human eye deflect near sightedness. Myopia Hypermetropia Presbyopia Calaract
5 Which scientist made the fist successful terrestrial measurement of the speed of light Isaac Newton Ole Romer Armand Fizeace Albert Michelson
6 The primary purpose of using a large aperture objective in a telescope is to produce Brighter image Larger image Wider field of view Smaller image
7 A diverging lens may not have Negative focal length Positive focal length One plane surface One convex surface
8 What is zoom lens It is a lens having fixed focal length It is a lens having variable focal length It is a lens used in radii to telescope All of the above
9 A Fly is found to be sitting on a telescope when it is focused towards the moon What effect is expected on the photograph of the moon. Intensity remains unchanged No effect The complete field of view is blocked Coloured image will be seen
10 The function of collimator in spectrometer is to Disperse the light Reflect the light Make the light parallel Diffract the light
11 In a compound microscope magnification will be large if focal length of eyepiece is Large small Equal to that of the objective Larger than that of the objective
12 Which of the following is the cause of failure of a lens to form a sharp and district image of a white object. Spherical aberration Chromatic aberration Distortion Astigmatism
13 The normal adjustment the magnifying power of an astronomical telescope is. fe/fo fo/fe fo+ fe fo -fe
14 If the image is virtual then its distance from the lens is taken. Positive Negative Double Half
15 linear magnification is the ratio between the Distances of object and image from mirror Distances of object and image from the focal point Distance of image and object from the mirror Distance of image from object and the distance of object from mirror
16 The near point of a person is 50 cm and his far point is 200 cm The power of the lenses which his spectacles should have to see clearly distant objects will be. -0.5 D -10 d -1.5 D -2.0 D
17 The near point of a person is 50 cm and his far point is 200 cm The power of the lenses which his spectacles should have for reading will be +D +2D +4D -2D
18 The real depth of a swimming pool is 2 m What is the apparent depth of the pool if the refractive index of water is 1.33 1.0 m 1.5 cm 2.0 m 2.5 m
19 Which of the following are defects is lenses. Chromatic aberration Spherical aberration Astigmation All of the above
20 Which instrument measures the magnification of a telescope. lactometer dynamometer Wattmeter Ammeter
21 Clouds are white because they efficiently scatter sunlight of all Colours Wavelengths Frequencies Phases
22 Which of the following are defects in human eye. Myopia Hypermetropia Presbyopia All of these
23 In water drops rainbows are formed by Reflection Refraction Dispersion All of these
24 The blooming of the image due to dispersion in lenses is called. spherical aberration Chromatic aberration Astigmation Curvature of image field
25 Power of lens is measured in cm Metres cm-1 Dioptres
26 Which of the following is used for the failure of a lens to form a sharp and distinct image. Distortion Astrigmation Chromatic aberration spherical aberration
27 Which of the following is used for the failure of a lens to form a sharp and distinct image Distortion Astigmation Chromatic aberration Spherical aberration
28 Which Muslim Scientist is regarded as 'Father of Optics" Nasir al Din al Tusi Ibn Ishaq al kundi Ibn Musa Al khawarzmi Ibn al Haithem
29 Which of the following is used for reducing spherical aberrations in optical instruments. Plano convex lens Concave lens Spherical mirrors Piane mirrors
30 Which Muslim Scientist gave the first clear description and correct analysis of pinhole camera. Nasir al Din Al tusi Ibn al Haithem Ibn Ishaqal kundi al -Khawarizmi
Download This Set

Is this page helpful?

×