MCQOPTIONS
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MCQOPTIONS
This section includes 6820 Mcqs, each offering curated multiple-choice questions to sharpen your Science knowledge and support exam preparation. Choose a topic below to get started.
| 2201. |
What is the point at which the light rays coming from a source meet after reflection or refraction from a plane, what is that point called the source? |
| A. | Virtual reflection |
| B. | real image |
| C. | Both of the above are correct. |
| D. | none of these |
| Answer» C. Both of the above are correct. | |
| 2202. |
When red glass is heated to a high temperature, it will appear? |
| A. | Red |
| B. | Green |
| C. | Blue |
| D. | Yellow |
| Answer» C. Blue | |
| 2203. |
The speed of light with increase in temperature of the medium. . . |
| A. | increases |
| B. | happens |
| C. | stays the same |
| D. | usually falls |
| Answer» D. usually falls | |
| 2204. |
In Einstein's E=mc² equation,Cdenotes? |
| A. | of sound velocity |
| B. | Of light velocity |
| C. | of light wavelength |
| D. | a constant |
| Answer» C. of light wavelength | |
| 2205. |
Do the wires twinkle? |
| A. | due to refraction |
| B. | due to reflection |
| C. | due to polarity |
| D. | due to scattering |
| Answer» B. due to reflection | |
| 2206. |
If a person cannot see distant objects clearly, what will be the defect in his vision? |
| A. | far-sightedness |
| B. | near vision |
| C. | astigmatism |
| D. | none of these |
| Answer» C. astigmatism | |
| 2207. |
Why is the sun visible before and after reaching the full horizon at sunrise and sunset? |
| A. | due to reflection |
| B. | due to refraction |
| C. | Due to the angle of reflection |
| D. | due to all of the above |
| Answer» C. Due to the angle of reflection | |
| 2208. |
Why does the sun appear red when it is setting? |
| A. | reflection |
| B. | scatter |
| C. | refraction |
| D. | diffraction |
| Answer» C. refraction | |
| 2209. |
Which of the following photographic camera acts as the retina of the eye? |
| A. | light hole |
| B. | shutter |
| C. | Lens |
| D. | film |
| Answer» E. | |
| 2210. |
The three colors are the basic colors, are they? |
| A. | blue, yellow and red |
| B. | blue, green and red |
| C. | yellow, green and red |
| D. | blue, yellow and green |
| Answer» C. yellow, green and red | |
| 2211. |
When white light passes through a prism, which color is most disturbed? |
| A. | Red |
| B. | purple |
| C. | Yellow |
| D. | sky |
| Answer» C. Yellow | |
| 2212. |
We use indigo while washing clothes, its . . . |
| A. | Due to better scouring action |
| B. | Due to the correct character combination |
| C. | because of the bright appearance |
| D. | because of the very low price |
| Answer» C. because of the bright appearance | |
| 2213. |
White light is made up of how many colors? |
| A. | 3 |
| B. | 4 |
| C. | 5 |
| D. | 7 |
| Answer» E. | |
| 2214. |
Which of the following types of light is rapidly absorbed by the plant? |
| A. | purple and orange |
| B. | blue and red |
| C. | indigo and yellow |
| D. | yellow and purple |
| Answer» C. indigo and yellow | |
| 2215. |
Used to prevent farsightedness? |
| A. | Concave lens |
| B. | Convex mirror |
| C. | convex lens |
| D. | concave mirror |
| Answer» D. concave mirror | |
| 2216. |
Light is made up of tiny particles called? |
| A. | nuclear |
| B. | neutron |
| C. | positron |
| D. | photon |
| Answer» E. | |
| 2217. |
to a person suffering from nearsightedness. . . |
| A. | Nearby object will not be visible |
| B. | Some object will be visible and some will not. |
| C. | Nothing will be visible. |
| D. | Distant objects are not visible. |
| Answer» E. | |
| 2218. |
Rays of light in a homogeneous medium. . . |
| A. | Can go in a slanted line. |
| B. | transmitted in a straight line. |
| C. | Both of the above are correct. |
| D. | There is always a slant. |
| Answer» C. Both of the above are correct. | |
| 2219. |
The human eye forms the image of an object on which of the following parts? |
| A. | cornea |
| B. | iris |
| C. | pupil |
| D. | retina |
| Answer» E. | |
| 2220. |
When white light passes through a prism, the color that gets disturbed the least is |
| A. | Red |
| B. | Yellow |
| C. | purple |
| D. | Green |
| Answer» B. Yellow | |
| 2221. |
ight is a kind of electromagnetic wave- who first told this? |
| A. | newton |
| B. | huygens |
| C. | Germaldi |
| D. | maxwell |
| Answer» E. | |
| 2222. |
Does lunar eclipse happen? |
| A. | new moon day |
| B. | full moon day |
| C. | crescent day |
| D. | new moon and full moon days |
| Answer» C. crescent day | |
| 2223. |
Who replaced the wave theory of light? |
| A. | by Newton |
| B. | by Huygens |
| C. | by plank |
| D. | by faraday |
| Answer» C. by plank | |
| 2224. |
Farsightedness in old age is the defect in which the lens- |
| A. | loses its elasticity |
| B. | becomes more transparent |
| C. | turns opaque |
| D. | becomes too small |
| Answer» E. | |
| 2225. |
What is the image of the retina of the human eye? |
| A. | real and inverted |
| B. | real and straight |
| C. | virtual and inverted |
| D. | virtual and erect |
| Answer» B. real and straight | |
| 2226. |
Which principle is used in optical fiber? |
| A. | light scattering |
| B. | gradual refraction |
| C. | interference |
| D. | Full internal reflection |
| Answer» E. | |
| 2227. |
The color of a star shows its . . . |
| A. | of weight |
| B. | shaped |
| C. | of heat |
| D. | of distance |
| Answer» D. of distance | |
| 2228. |
The color of an opaque object is due to the color to which it is. . . . . . . . . . . . . . . |
| A. | absorbs |
| B. | refracts |
| C. | reflects |
| D. | scatters |
| Answer» D. scatters | |
| 2229. |
What is telescope? |
| A. | distant object seen |
| B. | Nearby object is seen |
| C. | water depth is measured |
| D. | none of these |
| Answer» B. Nearby object is seen | |
| 2230. |
What is the principle on which optical fiber works? |
| A. | total internal reflection |
| B. | refraction |
| C. | scatter |
| D. | interference |
| Answer» B. refraction | |
| 2231. |
Which of the following phenomena does not occur in both light and sound? |
| A. | diffraction |
| B. | Polarization |
| C. | reflection |
| D. | refraction |
| Answer» C. reflection | |
| 2232. |
What does the watchmaker use to see the fine parts of the watch? |
| A. | of photo camera |
| B. | Magnifying lens |
| C. | compound microscope |
| D. | visionary |
| Answer» C. compound microscope | |
| 2233. |
The focal length of a convex lens is 0.2 m. Will it be capable? |
| A. | + 2D |
| B. | - 2D |
| C. | - 4D |
| D. | +5D |
| Answer» E. | |
| 2234. |
Does glazed glass appear to be glazed? |
| A. | due to refraction |
| B. | due to reflection |
| C. | due to interference |
| D. | Due to complete internal reflection |
| Answer» E. | |
| 2235. |
Used for the treatment of amblyopia? |
| A. | Concave lens |
| B. | convex lens |
| C. | Bifocal lens |
| D. | Cylindrical lens |
| Answer» E. | |
| 2236. |
Which mirror is used in the headlight of a car? |
| A. | Flat |
| B. | Spherical convex |
| C. | parabolic concave |
| D. | Flat convex |
| Answer» D. Flat convex | |
| 2237. |
What type of glass is used for visualization in a car? |
| A. | concave mirror |
| B. | cylindrical mirror |
| C. | Convex mirror |
| D. | plane mirror |
| Answer» D. plane mirror | |
| 2238. |
If a green electric bulb is installed in a room, will the red cloth be visible? |
| A. | yellowish |
| B. | orange colored |
| C. | black colored |
| D. | of blue colour |
| Answer» D. of blue colour | |
| 2239. |
What is the primary color? |
| A. | colors found in nature |
| B. | rainbow colors |
| C. | colors of the spectrum of white light |
| D. | Colors that cannot be produced by mixing other colors? |
| Answer» E. | |
| 2240. |
The process of separating white light into its different colors is called? |
| A. | scatter |
| B. | dispersion |
| C. | diffraction |
| D. | character deflection |
| Answer» E. | |
| 2241. |
Which optical instrument is used to observe distant objects? |
| A. | simple microscope |
| B. | compound microscope |
| C. | electron microscope |
| D. | visionary |
| Answer» E. | |
| 2242. |
Use it to shave? |
| A. | concave mirror |
| B. | plane mirror |
| C. | Convex mirror |
| D. | none of these |
| Answer» B. plane mirror | |
| 2243. |
The reason for the elliptical appearance of the Sun and the Moon near the horizon is? |
| A. | refraction |
| B. | optical illusion |
| C. | interference event |
| D. | his true figure |
| Answer» B. optical illusion | |
| 2244. |
If the power of a lens of a spectacle is +2 diopters, then its focal length will be? |
| A. | 200 cm |
| B. | 100 cm |
| C. | 50 cm |
| D. | 2 cm |
| Answer» D. 2 cm | |
| 2245. |
To a person suffering from far-sightedness. . . . . . . . . |
| A. | distant objects are not visible |
| B. | Nearby objects are not visible |
| C. | objects appear skewed |
| D. | objects appear upside down |
| Answer» C. objects appear skewed | |
| 2246. |
Used for the treatment of presbyopia? |
| A. | concave lens |
| B. | convex lens |
| C. | Convex mirror |
| D. | Bifocal lens |
| Answer» E. | |
| 2247. |
What is the nature of light radiation? |
| A. | wavelike |
| B. | like a particle |
| C. | wave-like |
| D. | not the same as wave and particle |
| Answer» D. not the same as wave and particle | |
| 2248. |
What is the unit of power of a lens? |
| A. | opter |
| B. | Diopter |
| C. | lumen |
| D. | Lux |
| Answer» C. lumen | |
| 2249. |
Sodium vapor lamps are often used for street lighting because . . . . . . . . . . |
| A. | it is cheap |
| B. | Their light is monochromatic and does not split when passing through water droplets. |
| C. | is cool for the eyes |
| D. | it gives bright light |
| Answer» C. is cool for the eyes | |
| 2250. |
The technique used for the exploration of the stomach or other internal organs of the body is based on endoscopy? |
| A. | on the diffraction phenomenon |
| B. | on the phenomenon of total internal reflection |
| C. | on interference phenomenon |
| D. | on polarization phenomenon |
| Answer» C. on interference phenomenon | |