Question 20.......plz explain...... The.... Question....... .....
pushkar , 6 Years ago
Grade
Wave Optics> Question 20.......plz explain...... The.....
1 Answers
Mahima Kanawat
Last Activity: 6 Years ago
Dear student
Let the point of reflection be O.
The angle of incidence = angle of reflection
So, angle PSO = angle QS'O
The two triangles PSO and QS'O right angled triangle. These two angles are similar triangles here (Rule of mathematics )
Therefore ratio of sides should be same.
S'Q /SP= OQ /OP
1/4 = OQ /OP
OQ + OP = 12
By solving ratio OP = 9.6 cm and OQ =2.4cm
Answer is B
WITH REGARDS
MAHIMA
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