MDCAT Physics Chapter 7 Light Online Test With Answers

MDCAT Physics Chapter 7 Light Online Test

Sr. # Questions Answers Choice
1 In YDS experiment, if the distance between the slits and also the distance between slits and screen is doubled, the fringe width Becomes doubled Becomes 4 times Is halved Remains the same
2 In case of YDS experiment, the distance of the mth bright fringe on the screen from center is Y = (m + 1)<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 248);"><i>λ</i></span>L/d Y = m<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 248);"><i>λ</i></span>L/d Y = (m + 1/2)<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 248);"><i>λ</i></span>L/d None of these
3 In cause of YDS experiment, the distance between adjacent bright fringes is given by <span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>Δ</i></span>y =<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>λ</i></span>L/d <span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>Δ</i></span>Y = L/<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 248);"><i>λ</i></span>d <span style="font-family: &quot;Times New Roman&quot;; font-size: 24px; color: rgb(34, 34, 34); text-align: center; background-color: rgb(255, 255, 224);"><i>Δ</i></span>Y =<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>λ</i></span>/L None of these
4 In YDS experiment, condition for constructive interference is that path difference is equal to n<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>λ</i></span> m<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>λ</i></span> (n + 1/2)<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>λ</i></span> (m + 1/2)<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>λ</i></span>
5 Experimental demonstration of wave nature of light was given in 1801 by New ton Maxwell Thomas young Huygen
6 In an interference pattern of Young,s Double Slit (YDS) experiment Bright fringes are wider than dark fringes Dark fringes are wider than bright fringes Both dark and bright fringes are of equally spaced Central fringes are wider than the outer fringes
7 Phase change of 180° is equivalent to a path difference of 2<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>λ</i></span> <span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>λ</i></span> <span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>λ/2</i></span> <span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>λ/4</i></span>
8 In case of destructive interference of two waves, the amplitude of the resultant wave will be ______ either of the waves Greater then Smaller then Equal to None of these
9 The path difference and phase difference are related to each other as Phase difference = (2<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 248);"><i>π</i></span>) x path difference Phase difference = (2<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 248);"><i>π</i></span>/<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>λ</i></span>) x path difference Phase difference = (<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>λ</i></span>/2) x path difference Phase difference = (2<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>λ</i></span>/<i style="text-align: center;">π</i><span style="text-align: center;">) x path difference</span>
10 The property of light which does not change with the nature of the medium is Frequency Amplitude Wavelength None of these
11 A line which represents the direction of travel of a wave is known as Wave front Locus Ray of light Either b and c
12 The speed of the secondary wavelets as mentioned in Huygen's principle is ________ the speed of propagation of the wave itself Equal to Greater than Smaller than None of these
13 Speed of light in vacuum is 0 ms<sup>-1</sup> 3 x 10<sup>8</sup>ms<sup>-1</sup> 1.5 x 10<sup>8</sup>ms<sup>-1</sup> None of these
14 Angle between ray of light and the corresponding wave front is 10<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span> 60<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span> 90<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span> 120<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span>
15 Monochromatic light directly means waves of Same frequency Same color Same wavelength All of them
16 Wavelength of red color as compared to that of violet color is Smaller Longer Equal None of these
17 Which one of the following can act approximately as a source of monochromatic light Neon lamp Fluorescent tube Sodium lamp none of these
18 Wavelength of light, on the average, is given by 10<sup>-14</sup>m 10<sup>-10</sup>m 10<sup>-6</sup>m 10<sup>-4</sup>m
19 Light waves are Transverse waves Longitudinal waves Compressional wave None of these
20 When observed by transmitted light, the central band of newton's ring system consists of: Bright circular ring Dark circular ring May be bright or dark circular ring No interference bands
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