The distance between a node and an anti-node for a transverse wave is equal to?
A. the wavelength B. thrice the wavelength C. one-half of the wavelength D. one-quarter of the wavelength E. three-quarters of the wavelength Correct Answer: Option D – one-quarter of the wavelength
The refractive index of a given transparent medium is 1.4. Which of the following is the minimum internal angle for total internal reflection to take place in the medium?
A. 30° B. 36° C. 44° D. 46° E. 54° Correct Answer: Option D – 46°The image in a pine-hole camera is always?
A. diminished B. enlarged C. upright D. inverted E. blurred Correct Answer: Option D – inverted
A ray of light is incidence on a plane mirror at an angle of 35°. What is the angle by the reflected ray with the surface of the mirror?
A. 125° B. 70° C. 65° D. 55° E. 35° Correct Answer: Option D – 55° Explanation The angle of reflection is always equal to the angle of incidence, which is the angle that the incoming ray, called incident ray makes with the normal. (Please note that the angle of...
A short chain is usual attached to the back of a petrol tanker trailing behind it to ensure that the?
A. petrol tanker is balanced on the wheel B. heat generated by friction in the engine can be conducted to the floor C. charges generated by friction in the tanker can be conducted to the earth D. the tanker moves slowly as the chain touches the floor E. chain produces...Products
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