Advertisements
Advertisements
प्रश्न
What is hypermetropia?
Advertisements
उत्तर
Hypermetropia (or) Long-sightedness is a vision defect in which a person can see distant objects clearly but cannot see the nearby objects clearly.
संबंधित प्रश्न
Define and describe the magnifying power of an optical instrument.
Answer the following question in detail.
What is a terrestrial telescope and an astronomical telescope?
Answer the following question in detail.
What is the limitation in increasing the magnifying powers of a compound microscope?
Discuss about simple microscope and obtain the equations for magnification for near point focusing and normal focusing.
What is the near point focusing?
What is the use of collimator in a spectrmeter?
What are the uses of spectrometer?
What is the remedy of myopia?
What is presbyopia?
What is astigmatism? What is its remedy?
Mention different parts of the spectrometer.
Explain the preliminary adjustments of the spectrometer.
A compound microscope has a magnifying power of 100 when the image is formed at infinity. The objective has a focal length of 0.5 cm and the tube length is 6.5 cm. What is the focal length of the eyepiece.
A light wave of wavelength λ is incident on a slit of width d. The resulting diffraction pattern is observed on a screen at a distance D. If linear width of the principal maxima is equal to the width of the slit, then the distance D is
The magnifying power of a telescope is high if its objective and eyepiece have respectively ______.
A simple microscope is used to see the object first in blue light and then in red light. Due to the change from blue to red light, what is the effect on its magnifying power?
The speed of light in media 'A' and 'B' are 2.0 × 1010 cm/s and 1.5 × 1010 cm/s respectively. A ray of light enters from medium B to A at an incident angle 'θ'. If the ray suffers total internal reflection, then ______.
Magnification produced by astronomical telescope for normal adjustment is 10 and length of telescope is 1.1 m. The magnification when the image is formed at least distance of distinct vision (D = 25 cm) is ______.
The image formed by an objective of a compound microscope is ______.
