Optical Instruments
Physics ⇒ Light and Optics
Optical Instruments starts at 10 and continues till grade 12.
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See sample questions for grade 11
A compound microscope consists of which two main lenses?
A person with hypermetropia uses a lens of power +2.5 D. What is the focal length of the lens in meters?
A telescope has an objective lens of focal length 100 cm and an eyepiece of focal length 5 cm. What is its magnifying power for viewing distant objects?
Describe the function of the diaphragm in a compound microscope.
Explain why a reflecting telescope is preferred over a refracting telescope for astronomical observations.
In a laboratory, a student uses a microscope with an objective of magnification 40× and an eyepiece of magnification 10×. What is the total magnification?
Name the defect of vision in which a person cannot see distant objects clearly, and state the type of lens used to correct it.
Name the optical instrument that is used to measure the angle of rotation of the plane of polarization of light.
State one main difference between a refracting telescope and a reflecting telescope.
The magnifying power (M) of a simple microscope is given by M = 1 + D/f, where D is the least distance of distinct vision and f is the focal length of the lens. If D = 25 cm and f = 5 cm, calculate the magnifying power.
Which optical instrument is used to produce a virtual, erect, and magnified image of an object placed very close to it?
Which optical instrument is used to split light into its constituent colors for analysis?
Which part of the human eye is responsible for focusing light onto the retina?
