The fundamental principle utilized in an optical endoscope, which allows doctors to examine the inside of the human body, is: MCQ with Answer and Explanation
The fundamental principle utilized in an optical endoscope, which allows doctors to examine the inside of the human body, is:
A. Diffraction of light
B. Scattering of light
C. Polarization of light
D. Total internal reflection of light
Answer: Option D
Solution (By JKSSB Mock Tests)
Endoscopes consist of bundles of flexible optical fibers. Light introduced at one end is trapped inside the fiber core because it repeatedly strikes the boundary at an angle greater than the critical angle. This Total Internal Reflection allows light and visual images to be transmitted through complex, curving paths inside the body.
The velocity-time graph of a particle moving in a straight line is shown. The displacement of the particle from t=0 to t=4s is: [Graph: triangle from (0,0) to (2,10) to (4,0)]
Explanation:
Displacement = area under velocity-time graph. The graph forms a triangle with base 4 s and height 10 m/s. Area = ½ × base × height = ½ × 4 × 10 = 20 m. Since velocity is always positive, displacement equals distance travelled. Graphical analysis is powerful: area gives displacement, slope gives acceleration. This triangle represents motion with uniform acceleration followed by uniform retardation. Exam tip: For piecewise linear v-t graphs, calculate area of each geometric segment separately. Such graph-based questions assess conceptual clarity in motion analysis.
No comments yet. Be the first to start the discussion!