(a)What is the electromagnetic wave being used in most TV remotes and what is the nature oftheir wavelengths?1.(b)Briefly explain what happens when light hits a rough surface and disperses in differentdirections.(c)Briefly explain what happens if an object is placed between the centre of curvature(c) and thefocal point (F) of a concave mirror as shown in Figure Q1.(c) below:ObjectFigure Q1.(c)(d)Two people are speaking at the same time, with the voice of one of them slightly higher thanthe other. What property of sound can be used to identify these individuals? Explain briefly.A man builds a house with hollow blocks. What is the effect of the hollow blocks with respectto sound? Give two other examples of techniques that he could use to achieve the same effect.(e)(f)Why do oceans store heat during the summer period and slowly release it during the winter?

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Answered: (a) What is the electromagnetic wave…

Science

Physics

(a) What is the electromagnetic wave being used in most TV remotes and what is the nature of their wavelengths?

Inquiry into Physics

8th Edition

ISBN:9781337515863

Author:Ostdiek

Publisher:Ostdiek

Chapter9: Optics

Section: Chapter Questions

Problem 49Q

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Question

(a)
What is the electromagnetic wave being used in most TV remotes and what is the nature of
their wavelengths?
1.
(b)
Briefly explain what happens when light hits a rough surface and disperses in different
directions.
(c)
Briefly explain what happens if an object is placed between the centre of curvature(c) and the
focal point (F) of a concave mirror as shown in Figure Q1.(c) below:
Object
Figure Q1.(c)
(d)
Two people are speaking at the same time, with the voice of one of them slightly higher than
the other. What property of sound can be used to identify these individuals? Explain briefly.
A man builds a house with hollow blocks. What is the effect of the hollow blocks with respect
to sound? Give two other examples of techniques that he could use to achieve the same effect.
(e)
(f)
Why do oceans store heat during the summer period and slowly release it during the winter?

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