Optics — Page 1 — Tinkutara Math Forum

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Question 223847

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Question 207005

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

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

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prove snell′s law

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Question 176966

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prove the distance between object and image of glass slab.

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

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

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

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

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Question 139060

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Question 137547

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

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Question 84667

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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.

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Question 60597

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Question 54357

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Question 52593

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Question 50453

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Question 47912

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Question 45610

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Question 44676

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Question 43596

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Question 43571

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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).

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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?

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A concave lens of focal length 60cm is made of material whose refractive index for red light is 1.641 and refractive index for blue light is 1.659.That for white light is 1.65.It is combined with a convex lens of dispersive power 0.0173 to form an achromatic doublet. Calculate the focal length of the achromatic lens.

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How far must a man stand in front of a concave mirror of radius 120cm in order to see an erect image of his face four times its actual size?

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Calculate the deviation of a ray of light,which is incident on a plane mirror at an angle of 40°.

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A glass prism made from a material of refractive index 1.55 has a refracting angle of 60°.The prism is immersed in water of refractive index 1.33.Determine the angle of minimum deviation for a parallel beam of light passing through the prism.

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A man 2m 50cm tall stands a distance of 3m in front of a large vertical plane mirror. i)what is the shortest length of the mirror that will enable the man see himself fully? ii)what is the answer of the above if the man were 5m away?

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Two plane mirrors are inclined at an angle of 30°.A ray of light which makes an angle of incidence of 50° with one of the mirrors,undergoes two successive reflections at the mirrors.Calculate the angle of deviation. please help....its urgent