MDCAT Physics Chapter 7 Light Online Test With Answers

MDCAT Physics Chapter 7 Light Online Test

Sr. # Questions Answers Choice
1 Which part of the spectrum is most visible? Red Violet Yellow Yellow-green
2 Finger prints on paper are identified by sprinkling fluorescent powder on it and observing it under Sun light Sodium light Infrared UV
3 The image formed by an eyepiece of compound microscope is Real and diminished Real and enlarged Virtual and enlarged Virtual and diminished
4 To get three images of a single object,one should have two plane mirrors at an angle of 90° 120° 30° 160°
5 If red light is incident on sea water it appears Red Green Blue Yellow
6 Which of the following colors suffers maximum deviation in a prism? Yellow Blue Green Orange
7 A diffraction pattern is obtained using a beam of red light What will happen if the red light is replaced by blue light? No change Diffraction bands become narrower and crowded together Bands become broader and farther apart Bands disappear
8 Soap bubble looks colored due to Dispersion Reflection Interference Any one of these
9 Two sources of light are said to be coherent when the waves produced by them have Equal wavelength Equal amplitude Equal wavelength and constant phase difference Amplitude and wavelength are same
10 If light of low wavelength is used in Young's double slit experiment then width of the fine will Decreases Increase Not fixed No change
11 Two wave of intensities I an 4I superpose then the maximum and minimum intensities are 5I and 3I 9I and I 9I and 3I 5I and I
12 Which does not show polarization? Longitudinal waves in gas Transverse wave in gas Both A and B None of these
13 If a lens is cut into two piece perpendicular to the principal axis and only part is used the intensity of the image: Remains same 1/2 times 2 times Infinite
14 What is the main cause of the shinning of diamond? Reflection Refraction Total internal reflection Dispersion of light
15 Which of the following spectrum have all the frequencies from high to low frequency range? Band spectrum Continuous spectrum Line spectrum Discontinuous spectrum
16 All of the following statements are correct except The total focal length of an astronomical telescope is the sum of the focal lengths of its two lenses The image formed by the astronomical telescope is always erect because the effect of the combination of the two lenses is divergent The magnification of an astronomical telescope can be increased by decreasing the focal length of the eyepiece.
17 The length of a telescope is 36 cm.The focal lengths of its lenses can be 30 cm,6 cm -30 cm,-6 cm 30 cm,-6 cm -30 cm,-6 cm
18 To increase the magnification of a telescope The objective lens should be of large focal length and eyepiece should be of short focal length The objective and eyepiece both should be of large focal lengths Both the objective and eyepiece should be of smaller lengths The objective should be small focal length and eyepiece should be of large focal length
19 If tube length of astronomical telescope is 105 cm and magnifying power is 20 for normal setting calculate the focal length of objective 100 cm 10 cm 20 cm 25 cm
20 A planet is observed by an astronomical refracting telescope having an objective of focal length 16 m and an eyepiece of focal length 2 cm. The distance between the objective and the eyepiece is 8m The angular magnification of the planet is 200 The image of the planet is inverted The objective is smaller than the eyepiece
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