MDCAT Physics Chapter 7 Light Online Test With Answers

MDCAT Physics Chapter 7 Light Online Test

Sr. # Questions Answers Choice
1 The speed of light in vacuum is 3 x 108 ms-1.Its speed in a medium of refractive index 1.5 will be 6.5 x 10<sup>8</sup> 2 x 10<sup>8</sup> ms<sup>-1</sup> 4.5 x 10<sup>8</sup> cm 5.5 x 10<sup>8</sup>
2 The critical angle for a ray of light suffering total internal reflection will be smallest for the ray traveling from Water to glass Water to air Glass to air Glass to water
3 Just before  setting the sun may appear to be elliptical This happens due to Diffraction Reflection Dispersion Refraction
4 At what distance should a book be placed from a 50 Cd bulb so that the luminance on the book becomes 2 Im m-2 50 m 10 m 5 m 1 m
5 Inverse square law for luminance is valid for Search light Isotropic point source Cylindrical source All types of sources
6 If the distance of a surface from light source is doubled,then the luminance will become 1/4 times 1/2 times 2 times 4 times
7 A beam of light enters air from water.Which of the following characteristics of light will not change in water? Frequency Wavelength Velocity Amplitude
8 For obtaining equal and same height mirror should be Convex Concave Plane None
9 In a astronomical telescope the final image for normal vision is formed at The focal of the eye piece The least distance of the distinct vision The focus of the objective lens Infinity
10 If the red light is replaced by blue light illuminating the object in a microscope the resolving power of the microscope Decreases Increases Gets halved Remains unchanged
11 Near and far points of a healthy human eye respectively are 0 and 25 cm 0 and infinity 25 cm and 100 cm 25 cm and infinity &nbsp;
12 The resolving power of telescope depends on Focal length of eye lens Focal length of objective lens Length of the telescope Diameter of he objective lens
13 In a compound microscope the intermediate image is Virtual erect and magnified Real,erect and magnified Virtual,inverted and magnified Virtual,erect and reduced
14 Resolving power of a telescope depends on: The magnification of eyepiece The focal length of objective lens Diameter of objective lens Refractive index of objective lens
15 Geometrical optics cannot give following characteristics for a microscope Image position Image size Resolution of image Any of the above
16 While viewing a distant object with a telescope suddenly a housefly sits on objective lens.The correct statement is that Housefly will be seen enlarged in image Housefly will be seen reduced in image Intensity of image will be decreased Intensity of image will be increased
17 The astronomical telescope consists of objective and eye piece.The focal length of he objective is Equal to that of the eye piece Greater than that of eye piece Shorter than that of eye piece Five times shorter than that of the eye piece
18 For the normal setting of a telescope Only the object is at infinity Only the final image is at infinity Both the object and the final image is at infinity Neither the object nor the final image has to be at infinity
19 Which of the following is conserved when light waves interfere? Intensity Energy Amplitude Momentum
20 A convex lens has focal length F.An object is placed at P then Image is formed at +&nbsp;∞ and is real Image is formed at +&nbsp;∞ and is virtual Image is formed at +&nbsp;∞ and is real Image is formed at + and is virtual
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