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OpticsQuestion and Answers: Page 1

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Question Number 181256 Answers: 0 Comments: 7

(1/f)=(n−1)((1/R_1 )−(1/R_2 )) lense′s maker equation. when is positive or negative R_1 and R_2 ?

$$\frac{\mathrm{1}}{{f}}=\left({n}−\mathrm{1}\right)\left(\frac{\mathrm{1}}{{R}_{\mathrm{1}} }−\frac{\mathrm{1}}{{R}_{\mathrm{2}} }\right)\:\:{lense}'{s}\:{maker}\:{equation}. \\ $$$${when}\:{is}\:{positive}\:{or}\:{negative}\:{R}_{\mathrm{1}} \:{and}\:\:{R}_{\mathrm{2}} ? \\ $$

Question Number 181172 Answers: 0 Comments: 2

write snell′s law that light move a concentrative medium to nonconcentrative medium and show with a shape.

$${write}\:{snell}'{s}\:{law}\:{that}\:{light}\:{move}\:{a}\: \\ $$$${concentrative}\:{medium}\:{to}\:{nonconcentrative} \\ $$$${medium}\:{and}\:{show}\:{with}\:{a}\:{shape}. \\ $$

Question Number 181171 Answers: 0 Comments: 1

prove snell′s law

$${prove}\:{snell}'{s}\:{law} \\ $$

Question Number 176966 Answers: 1 Comments: 1

Question Number 174095 Answers: 0 Comments: 0

prove the distance between object and image of glass slab.

$${prove}\:{the}\:{distance}\:{between}\:{object}\:{and} \\ $$$${image}\:{of}\:{glass}\:{slab}. \\ $$

Question Number 170721 Answers: 0 Comments: 1

Which is the true magnefication′s formula for the concave mirror? m=(f/(p−f))? m=−(f/(p−f))?

$${Which}\:{is}\:{the}\:{true}\:{magnefication}'{s}\: \\ $$$${formula}\:{for}\:{the}\:{concave}\:{mirror}? \\ $$$${m}=\frac{{f}}{{p}−{f}}? \\ $$$${m}=−\frac{{f}}{{p}−{f}}? \\ $$

Question Number 170720 Answers: 0 Comments: 0

Prove the magnefication for concave mirror. m=(f/(∣f−p∣))

$${Prove}\:{the}\:{magnefication}\:{for}\:{concave} \\ $$$${mirror}. \\ $$$${m}=\frac{{f}}{\mid{f}−{p}\mid} \\ $$

Question Number 165617 Answers: 1 Comments: 0

what is the focal length formula for combined lenses? if lenses more than tow?

$${what}\:{is}\:{the}\:{focal}\:{length}\:{formula}\:{for}\: \\ $$$${combined}\:{lenses}?\:{if}\:{lenses}\:{more}\:{than}\: \\ $$$${tow}? \\ $$

Question Number 164821 Answers: 0 Comments: 9

prove that n=((360^° )/∝)−1 n=number of multiple images

$${prove}\:{that}\:\:{n}=\frac{\mathrm{360}^{°} }{\propto}−\mathrm{1} \\ $$$${n}={number}\:{of}\:\:{multiple}\:{images}\: \\ $$

Question Number 139060 Answers: 0 Comments: 8

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Question Number 129103 Answers: 1 Comments: 0

how is the significant figures in 132+32.67+23+566??

$${how}\:{is}\:{the}\:{significant}\:{figures}\:{in} \\ $$$$\mathrm{132}+\mathrm{32}.\mathrm{67}+\mathrm{23}+\mathrm{566}?? \\ $$

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Question Number 69851 Answers: 0 Comments: 0

A convex mirror of radius of curvature 30cm forms a real image 20cm from its surface.Find whether the imavect is erect or inverted.Please explain how possible this is. Thanks in advance.

$${A}\:{convex}\:{mirror}\:{of}\:{radius}\:{of}\:{curvature} \\ $$$$\mathrm{30}{cm}\:{forms}\:{a}\:{real}\:{image}\:\mathrm{20}{cm}\:{from}\:{its} \\ $$$${surface}.{Find}\:{whether}\:{the}\:{imavect}\:{is} \\ $$$${erect}\:{or}\:{inverted}.{Please}\:{explain}\:{how}\: \\ $$$${possible}\:{this}\:{is}. \\ $$$$ \\ $$$${Thanks}\:{in}\:{advance}. \\ $$

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Question Number 42475 Answers: 0 Comments: 1

A signpost 4.5cm high is 30cm away⊛ from Mrs Rahup.What is the height of the image formed in her retina?(Take the eye lens-retina distance as 1.5cm).

$${A}\:{signpost}\:\mathrm{4}.\mathrm{5}{cm}\:{high}\:{is}\:\mathrm{30}{cm}\:{away}\circledast \\ $$$${from}\:{Mrs}\:{Rahup}.{What}\:{is}\:{the} \\ $$$${height}\:{of}\:{the}\:{image}\:{formed}\:{in}\:{her} \\ $$$${retina}?\left({Take}\:{the}\:{eye}\:{lens}-{retina}\right. \\ $$$$\left.{distance}\:{as}\:\mathrm{1}.\mathrm{5}{cm}\right). \\ $$

Question Number 42025 Answers: 0 Comments: 2

A man,near point is 90cm from his eyes and his far point is 3cm. What type of eye defect has he? If he is to read a book at 25cm and see distant object clearly,what type and power of lenses will you recommend for him?

$${A}\:{man},{near}\:{point}\:{is}\:\mathrm{90}{cm}\:{from} \\ $$$${his}\:{eyes}\:{and}\:{his}\:{far}\:{point}\:{is}\:\mathrm{3}{cm}. \\ $$$${What}\:{type}\:{of}\:{eye}\:{defect}\:{has}\:{he}? \\ $$$${If}\:{he}\:{is}\:{to}\:{read}\:{a}\:{book}\:{at}\:\mathrm{25}{cm}\:{and} \\ $$$${see}\:{distant}\:{object}\:{clearly},{what}\:{type} \\ $$$${and}\:{power}\:{of}\:{lenses}\:{will}\:{you} \\ $$$${recommend}\:{for}\:{him}? \\ $$$$ \\ $$

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