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Optics
A person with hypermetropia has a near point of 56 cm. This person wears glasses to correct their vision that have an optical power of +2.7 D.
If this person wears their glasses such that they sit 1.6 cm from their eye, how far away from the glasses is the closest object they can clearly see when wearing their glasses? (to 2 s.f and in cm)
If this person wears their glasses such that they sit 1.6 cm from their eye, how far away from the glasses is the closest object they can clearly see when wearing their glasses? (to 2 s.f and in cm)
Optics
What types of air film is obtained if we insert a thin paper between two plane parallel glass plates? What is the shape of interference obtained?On what factors does the fringe with depend?
Optics
Name three commonly used eyepieces. Which eyepiece is used in our lab spectrometer and why?
Optics
Why does sodium lamp give a red colour initially when switched on before giving yellow light?
Optics
Why do we place the grating surface normal to incident day in diffraction grating experiment?
Optics
A person with myopia has a far point of 2.4 m. This person wears glasses to correct their vision.
If the person wears their glasses 1.5 cm from their eye, what is the optical power of the corrective lenses that allow them to see distant objects clearly? (to 2 s.f and in D)
If the person wears their glasses 1.5 cm from their eye, what is the optical power of the corrective lenses that allow them to see distant objects clearly? (to 2 s.f and in D)
Optics
A person with presbyopia has a near point of 65 cm. This person wears glasses to correct their vision such that they can comfortably read the screen of their mobile phone when it is held 25 cm from their eyes.
If this person wears their glasses such that they sit 1.4 cm from their eye, what is the optical power of the corrective lenses in their glasses? (to 2 s.f and in D)
If this person wears their glasses such that they sit 1.4 cm from their eye, what is the optical power of the corrective lenses in their glasses? (to 2 s.f and in D)
Optics
A person with presbyopia has a near point of 65 cm. This person wears glasses to correct their vision such that they can comfortably read the screen of their mobile phone when it is held 25 cm from their eyes.
If this person wears their glasses such that they sit 1.4 cm from their eye, what is the optical power of the corrective lenses in their glasses? (to 2 s.f and in D)
If this person wears their glasses such that they sit 1.4 cm from their eye, what is the optical power of the corrective lenses in their glasses? (to 2 s.f and in D)
Optics
A ray of light is incident on a plane surface of refractive index√3 at a certain angle it is found that the reflected and refracted rays are perpendicular to each other then the angle of incidence is ?
Optics
A microscope has an eyepiece lens of 20X and an objective lens of 80X which are 25.0 cm apart. Calculate
(a) the total magnification
(b) the focal length of each lens
(c) where the object must be for a normal relaxed eye to see it in focus
(a) the total magnification
(b) the focal length of each lens
(c) where the object must be for a normal relaxed eye to see it in focus
