PPSC Physics Chapter 4 Geometrical Optics With Answers

image
image
image

PPSC Physics Chapter 4 Geometrical Optics

Sr. # Questions Answers Choice
1 What is the cause of mirage in desert areas. Refractive index of atmosphere increases with height Refractive index of atmosphere decreases with height Refractive index of atmosphere remains constant Scattering
2 Why danger signals are made red. Our eyes are more sensitive to real colour Red colour has minimum scattering Red colour has maximum scattering Red colour has maximum frequency
3 What is the focal length of a normal eye lens. 1 mm 2 cm 25 cm 1 m
4 A terrestrial telescope produces An react and real image An inverted and real image An inverted and virtual image An erect and virtual image
5 Which one of the following telescopes has the least length when set for parallel rays. Astronomical telescope Galileo's telescope Terrestrial telescope Reflecting telescope
6 Spherical aberration can be removed by using Concave lens Convex lens By limiting the number of rays using a stopper By using a concave convex lens
7 Chromatic aberration can be removed by using. Convex lens Two convex lenses Concave lens Combination of a convex lens and a concave lens
8 A person suffering from short sighted ness uses Concave lens Convex mirror Convex lens Concave mirror
9 The length of an astronimical telescope for normal vision is. fo x fe fe/fe fo - fe fo + fe
10 Which of the following electron wavelength is used in electron microscope. Short Extremely short Large Moderate
11 The erecting lens of a telescope produces A shorter instrument wider field of view A larger image A sharp image
12 In compound microscope image formed by the eyepiece is Real Inverted erect diminished
13 In compound microscope, image formed by the eyepiece is Real Invented Erect Diminished
14 On which of the following the object size as perceived by eye depends upon. Actual size of the object Aperture of the pupil Object distance from the eye Size of the image formed on the retina
15 The aberration in the image formed by a lens due to different wavelengths present in a source is called. Spherical aberration Chromatic aberration Astigmation Achromatic aberration
16 The power of convex lens is 10 d. At what distance the 3 times larger image is formed. 9.6 cm 2.3 cm 13.3 cm 17.6 cm
17 the depth of a pond is 4 m What is the apparent depth of the pond if the water level is 3.5 m high. The refractive index of water is 1.33 1.9 m 2.3 m 3.13 m 4.5 m
18 Which of the following be used for redeciding mechanical aberration is optical instruments. Plane mirrors Spherical mirrors Concave lenses Plano convex lenses
19 On which property of lens, longitudinal chromatic aberration depend upon Resolving power Dispersive power Magnifying power Radius of curvature
20 The deflection image due to oblique centric rays failing on the lens is called. Coma Spherical aberration Astigmatism Curvature of image field
Download This Set

Is this page helpful?

×