MDCAT Physics Chapter 7 Light Online Test With Answers

MDCAT Physics Chapter 7 Light Online Test

Sr. # Questions Answers Choice
1 The experimental evidence in support of wave theory in Huygen's time was not present not convincing convincing none of them
2 Who proposed that light energy form a luminous source travels in space by means of wave motion? Newton Maxwell Einstein Huygen
3 The minimum number of lenses used in compound microscope is 1 2 3 4
4 The transmitter in optical fiber system contains a device called LED Diode Transistor None of these
5 Analyzer is use to Polarize the light Un-polarize the light Check whether the light is polarized or un polarized Rotate the plane of polarized light
6 For total internal reflection to take place, the angle of incidence must be ______ than critical angle and the light should travel from ______ to ______ medium Greater, rarer, denser Smaller, rarer, denser Smaller, denser, rarer Greater, denser, rarer
7 The variation if focal length of a lens when we pass from the central portion out words (to words the lens edges) is known as Astigmatism Chromatic Spherical aberration Coma
8 Which of the following light move faster in water Red Violet Green Blue
9 An optical fiber of ______ cm in diameter id equivalent to 7.62 cm diameter bundle of ______ wires to carry the same amount of signals 0.6, aluminum 6.0, copper 0.6, copper 6.0, aluminum
10 The fiber of which refractive index ______ gradually as move from central core to its periphery is called ______ index fiber Decreases, multi-mode graded Increases, single mode step Either of A or B Increases, multi-mode step
11 Cladding means a layer of ______ refractive index over the central core of ______ refractive index Lower, lower Higher, lower Lower, higher None of these
12 A fiber of 50μm diameter capable of carrying white light at ______ distances is called ______ index fiber Large, multi-mode step Small, multi-mode step Small, multi-mode graded Large, single mode step
13 Propagation of light in an optical fiber requires that light should be Refracted from air to fiber Continuously refraction Totally reflected within the fiber Both B and C
14 If we know the refractive index of glass, speed v of light in the glass can be found by v = c n v = c/n v = n/c None of these
15 Which type of optical fiber has the largest diameter Single mode step index fiber Multi-mode step index fiber Multi-mode graded index fiber None of these
16 Let a ray of light enters from air into two media of different refractive indices. The speed of light will be ______ to refractive index Directly proportional Inversely proportional Sometimes inversely Equal
17 The property of light which makes light possible to be transmitted into inaccessible place is Interference Diffraction Polarization None of these
18 The laser light used in an optical fiber system has a wavelength equal to 3<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>μ</i></span>m 5<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>μ</i></span>m 1.3<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>μ</i></span>m 6<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>μ</i></span>m
19 For glass-air boundary, the value of the critical angle is 42° 45° 30° 60°
20 The light waves and radio waves differ in Speed Frequency Wavelength Both B and C
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