Sound travels in air if
(a) particles of medium travel from one place to another
(b) there is no moisture in the atmosphere
(c) disturbance moves
(d) both particles as well as disturbance travel from one place to another
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Figure 10.1 shows a ray of light as it travels from medium A to medium B. Refractive index of the medium B relative to medium A is
(a) √3/√2 is the correct option
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In which of the three media, air, water or iron, does sound travel the fastest at a particular temperature?
Sound travels faster in iron and slowest in air
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In which of the three media, air, water or iron, does sound travel the fastest at a particular temperature?
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Establish the relationship between speed of sound, its wavelength and frequency. If velocity of sound in air is 340 m s–1, calculate
Derivation of formula v = ν λ. (i) 340 = 256 λ λ = 1.33 m. (ii) 340 = ν (0.85) ...
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Why does a ray of light bend when it travels from one medium into another?
When a ray of light travels from one medium to another, its speed changes and this change in speed of light causes the bending of light (refraction of light).
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Can a convergent lens in one medium become divergent in another medium?
Yes, a convergent lens in one medium becomes divergent in another medium when the refractive index of the medium is greater than the refractive index of the material of the...
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A mechanical wave propagates in a medium along the X-axis. The particles of the medium
(c) may move on the X-axis (d) may move on the Y-axis. EXPLANATION: Mechanical waves are either transverse or longitudinal. In the transverse wave, the particles will move on Y-axis while in the...
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Total internal reflection can take place only if (a) light goes from optically rarer medium (smaller refractive index) to optically denser medium
(b) light goes from optically denser medium to rarer medium EXPLANATION: When the light goes from a denser medium to lighter medium, it goes away from the normal. When the angle of...
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In a room containing air, heat can go from one place to another (a) by conduction only
(d) by all the three modes.
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Consider a system of two identical particles. One of the particles is at rest and the other has an acceleration vector a.
(b) 1/2 vector a. Explanation: Let the distance of CoM from the origin be X. if each particles with mass m be at distances x1 and x2 then X= (m*x1+ m*x2)/(m+m) Velocity of CoM...
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