ICS Part 1 Physics English Medium Chapter 10 Online Short Questions Test with Answers

Question # 1

What do you mean by "Normal adjustment " in an astronomical telescope?

Ans 1: In normal adjustment, the image formed by the objective lies at the focus of both the objective and the eye-piece and the final image appears to be formed at infinity. The distance between the objective and eye-piece of a telescope in normal adjustment is f_o+f_{e which equals the length of the telescope.}

Question # 2

How light signals is transmitted through optical fibre?

Ans 1: The lights signal are transmitted through the optical on the principle of
- Total internal reflection
- Continuous refraction
In multimedia step index fiber, the signal is transmitted baby means of total internal reflection while in case of multimode graded index fiber, the signals transmitted by total internal reflection and continuous refraction.

Question # 3

Define total internal reflection and continuous refraction.

Ans 1: Total Internal Reflection:When a light ray traveling from a denser medium towards a rare medium, makes an angle of incidence greater than critical angle of the medium, then the ray is totally reflected back into the same denser medium. This phenomenon is called total internal reflection.
Continuous Refraction: It is the mode of propagation of light in which light is continuously refracted inside the different graded index fibers which are used in fibre optics.

Question # 4

Differentiate between microscope and telescope.

Ans 1: Microscope is a device which is used to see the magnified image of very small and near object. Whereas telescope is an optical instrument used for viewing distant objects.

Question # 5

What is the near point? Give its numerical value?

Ans 1: The minimum distance from the eye at which an object appears to be distinct is called near point or least distance of distinct vision.
Its numerical value is 25 cm
The location of the near point, however , change with age.

Question # 6

An astronomical telescope of long focal length and large aperture is considered to be a good telescope. Why?

Ans 1: Objective of long focal length and large aperture is used to collect a great amount of light from the astronomical objects.

Question # 7

When object lie within the principle focus of convex lens what is the nature of image and where it is formed?

Ans 1: When object lie within the principle focus of convex lens, then image will be virtual, erect and magnified and will be formed at least distance of distinct vision.

Question # 8

Why we use infrared light in a fiber optics communication system?

Ans 1: Infrared light travels faster through optical fiber than visible light. So, it is preferred.

Question # 9

What are different types of optical fibre?

Ans 1: There are three types of optical fibres.
1. Single mode step index fibre.
2. Multimode step index fibre.
3. Multimode graded index fibre.

Question # 10

Why would it be advantageous to use blue light with a compound microscope?

Ans 1:

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ICS Part 1 Physics English Medium Chapter 10 Online Short Questions Test with Answers

Online Short Questions For Chapter 10 "ICS Part 1 Physics Chapter 10 Short Questions Test "

Physics - ICS Part 1 Physics Chapter 10 Short Questions Test

What do you mean by "Normal adjustment " in an astronomical telescope?

How light signals is transmitted through optical fibre?

Define total internal reflection and continuous refraction.

Differentiate between microscope and telescope.

What is the near point? Give its numerical value?

An astronomical telescope of long focal length and large aperture is considered to be a good telescope. Why?

When object lie within the principle focus of convex lens what is the nature of image and where it is formed?

Why we use infrared light in a fiber optics communication system?

What are different types of optical fibre?

Why would it be advantageous to use blue light with a compound microscope?

Prepare Complete Set Wise Questions For Chapter 10 "ICS Part 1 Physics Chapter 10 Short Questions Test "

Set 1

Set 2

Set 3

ICS Part 1 Physics Chapter 10 Short Questions Test - Set 1

What do you mean by "Normal adjustment " in an astronomical telescope?

How light signals is transmitted through optical fibre?

Define total internal reflection and continuous refraction.

Differentiate between microscope and telescope.

What is the near point? Give its numerical value?

An astronomical telescope of long focal length and large aperture is considered to be a good telescope. Why?

When object lie within the principle focus of convex lens what is the nature of image and where it is formed?

Why we use infrared light in a fiber optics communication system?

What are different types of optical fibre?

Why would it be advantageous to use blue light with a compound microscope?

ICS Part 1 Physics Chapter 10 Short Questions Test - Set 2

What is resolving power in optical instrument? Write formula for grating.

What do you understand by linear magnification and angular magnification?Explain how a convex lens is used as magnifier ?

If the person was looking through a telescope at thee full moon, how would the appearance of the moon be changed by covering half of the objective lens?

What are uses of spectrometer?

Define Snell's law and write its mathematical form.

How light signals is transmitted through optical fibre?

An astronomical telescope of long focal length and large aperture is considered to be a good telescope. Why?

Write any two uses of spectrometer.

What is the condition for total internal reflection?

Find magnifying power of a convex lens of 25 cm focal length act as a magnifying glass.

ICS Part 1 Physics Chapter 10 Short Questions Test - Set 3

Define total internal reflection.

Why would it be advantageous to use blue light with a compound microscope?

What are the problems having a high magnifying power in astronomical telescope?

One can buy a cheap microscope for used by the children. The image seen in such a microscope has coloured edges.Why is this so?

Why we use infrared light in a fiber optics communication system?

Write down the three major components on which a fibre communication system consists.

What is the function of collimator in a spectrometer?

When object lie within the principle focus of convex lens what is the nature of image and where it is formed?

What is spectrometer?

Define Magnification.

ICS Part 1 Physics Short Questions Test

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