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11th And 12th > Physics

RAY OPTICS FUNDAMENTALS MCQs

Total Questions : 30 | Page 1 of 3 pages
Question 1.


Two plane mirrors. A and B are aligned parallel to each other, as shown in 


the figure. A light ray is incident at an angle of 300 at a point just inside one 


end of A. The plane of incidence coincides with the plane of the figure. The 


maximum number of times the ray undergoes reflections (including the first 


one) before it emerges out is


Two Plane Mirrors. A And B Are Aligned Parallel To Each Othe...


[IIT-JEE (Screening) 2002]      


 


 


  1.     28
  2.     30
  3.     32
  4.     34
 Discuss Question
Answer: Option B. -> 30
:
B

From the following ray diagram


 Two Plane Mirrors. A And B Are Aligned Parallel To Each Othe...


Two Plane Mirrors. A And B Are Aligned Parallel To Each Othe...


 


Question 2.


When a plane mirror is placed horizontally on a level ground at a distance of 60m from the foot of a tower, the top of the tower and its image in the mirror subtend an angle of When A Plane Mirror Is Placed Horizontally On A Level Ground...at the eye. The height of the tower will b


[CPMT 1984]


  1.     30m
  2.     60m
  3.     90m
  4.     120m
 Discuss Question
Answer: Option B. -> 60m
:
B

When A Plane Mirror Is Placed Horizontally On A Level Ground...


Question 3.


A plane mirror is approaching you at a speed of A Plane Mirror Is Approaching You At A Speed Of You Can See ...you can see your image in it. At what speed will your image approach you 


  1.    
  2.    
  3.    
  4.    
 Discuss Question
Answer: Option C. ->
:
C

A Plane Mirror Is Approaching You At A Speed Of You Can See ...


Question 4.


A ray of light incidents on a plane mirror at an angle of A Ray Of Light Incidents On A Plane Mirror At An Angle Of  ... The deviation


produced in the ray is


  1.    
  2.    
  3.    
  4.    
 Discuss Question
Answer: Option D. ->
:
D

A Ray Of Light Incidents On A Plane Mirror At An Angle Of  ...


Question 5.


A man is 180 cm tall and his eyes are 10cm below the top of his head. In order to see his entire height right from toe to head, he uses a plane mirror kept at a distance of 1mfrom him. The minimum length of the plane mirror required is


 


[MP PMT 1993; DPMT 2001]


  1.     180cm
  2.     90cm
  3.     85cm
  4.     170cm
 Discuss Question
Answer: Option B. -> 90cm
:
B

A Man Is 180 Cm tall And His Eyes Are 10cm below The Top O...


Question 6.


A ray of light is incidenting normally on a plane mirror. The angle of reflection will be 


  1.    
  2.    
  3.     Will not be reflected
  4.     None of the above
 Discuss Question
Answer: Option A. ->
:
A

A Ray Of Light Is Incidenting Normally On A Plane Mirror. Th...


Question 7.


A plane mirror reflects a pencil of light to form a real image. Then the pencil of light incident on the mirror is
[MP PMT 1997; DCE 2001, 03]


  1.     Parallel
  2.     Convergent
  3.     Divergent
  4.     None of the above
 Discuss Question
Answer: Option B. -> Convergent
:
B

When converging beam incident on plane mirror, real image is formed as shown


 A Plane Mirror Reflects A Pencil Of Light To Form A Real Ima...


Question 8.


What should be the angle between two plane mirrors so that whatever be the angle of incidence, the incident ray and the reflected ray from the two mirrors be parallel to each other  [KCET 1994; SCRA 1994]


  1.    
  2.    
  3.    
  4.    
 Discuss Question
Answer: Option C. ->
:
C
Incident ray and finally reflected ray are parallel to each other means What Should Be The Angle Between Two Plane Mirrors So That W... 

What Should Be The Angle Between Two Plane Mirrors So That W...


Question 9.


A ray of light incident on the first mirror parallel to the second and is reflected from the second mirror parallel to first mirror. The angle between two mirrors is


  1.     30
  2.     60
  3.     75
  4.     90
 Discuss Question
Answer: Option B. -> 60
:
B
From geometry of figure
θ+θ+θ=180θ=60
A Ray Of Light Incident On The First Mirror Parallel To The ...
Question 10.


Finger prints on a piece of paper may be detected by sprinkling fluorescent


powder on the paper and then looking it into                                                      [MP PET/PMT 1988]


  1.     Mercury light
  2.     Sunlight
  3.     Infrared light
  4.     Ultraviolet light
 Discuss Question
Answer: Option D. -> Ultraviolet light
:
D

Ultraviolet light


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