Ray Optics(General Knowledge > General Science ) Questions and Answers
Question 1. Images seen in a plane mirror are always
Upright and Virtual
Upright and Real
Inverted and Virtual
Farther and Virtual
Explanation:-
Answer: Option A. -> Upright and Virtual
Question 2. Speed of light in a vacuum is
represented by the symbol "c"
3.00 X108 m/s
both answers are correct
All of above
Explanation:-
Answer: Option C. -> both answers are correct
Question 3. True or False:We see colors because those colors are reflected back to our eyes
True
False
Explanation:-
Answer: Option A. -> True
Question 4. An object is located 30 cm from a concave mirror
13.5 cm
0.0833 cm
12.0 cm
8.7 cm
Explanation:-
Answer: Option C. -> 12.0 cm
Question 5. If a wave's speed is 5m/s and it has a wavelength of 2
12.5Hz
2.5Hz
7.5Hz
2Hz
Explanation:-
Answer: Option D. -> 2Hz
Question 6. Which ways does light bend going from air to water?
away from the normal
towards the normal
does not ben
none of the above
Explanation:-
Answer: Option B. -> towards the normal
Question 7. A real image is formed in plane mirror
True
False
Explanation:-
Answer: Option B. -> False
Question 8. Through what kind of matter does light move fastest?
liquids
air
matter that is lighter in color
matter that is in larger objects
Explanation:-
Answer: Option B. -> air
Question 9. You have cool glow-in-the-dark stickers of Mickey Mouse
fluorescence
chemiluminescence
phosphorescence
incandescence
Explanation:-
Answer: Option C. -> phosphorescence
Question 10. A concave lens forms the image of an object such that the distance between the object and image is 10 cm and the magnification produced is 1/4
