Tag: space research and satellites

Questions Related to space research and satellites

______________________is a CMOS camera, performed mineralogical mapping in the 400900 nm band with a spectral resolution of 15 nm and a spatial resolution of 80 m.

physics search of life outside earth space research and satellites artificial satellites space missions and artificial satellites

  1. HEX

  2. Hyper Spectral Imager

  3. Moon Impact Probe

  4. none of the above

Show answer
Correct Option: B
Explanation:

The scientific payload in Chandrayaan contained 5 Indian Instruments and 6 instruments from other countries.

Hyper Spectral Imager (HY SI), one of the Indian instruments, is a CMOS camera that performed mineralogical mapping in the 400-900 nm band with a spectral resolution of 15 nm and a spatial resolution of 80 m.

Which of the following Indian instruments were used in chandrayaan?

physics search of life outside earth space research and satellites artificial satellites space missions and artificial satellites

  1. TMC

  2. LLRI

  3. HEX

  4. all of the above

Show answer
Correct Option: D
Explanation:

The scientific payload in Chandrayaan contained 5 Indian instruments and 6 instruments from other countries.

The Indian instruments used in Chandrayaan were Terrain Mapping Camera (TMC), Hyper Spectral Imager (Hy SI), Lunar Laser Ranging Instrument (LLRI), High Energy aj/gamma X-ray Spectrometer (HEX) and Moon Impact Probe (MIP).

The specifications of chandrayaan include which of the following?

physics search of life outside earth space research and satellites artificial satellites space missions and artificial satellites

  1. 1380 Kg in mass.

  2. Cuboidal in shape

  3. Fuel and oxidiser were stored in two tanks of 390 litres each.

  4. all of the above

Show answer
Correct Option: D
Explanation:

The mass of Chandrayaan was 1380 kg at launch, 675 kg at lunar orbit and 523 kg after releasing the impactor. It was cuboidal in shape. The spacecraft used a bipropellant  integrating propulsion system to reach lunar orbit as well as its maintenance while operating the moon. The power plant consisted of one 440 N engine and eight 220 thrusters. Fuel and oxidiser were stored in two tanks of 390 litres each.

The Chandrayaan used a _______________ integrated propulsion system to reach lunar orbit as well as orbit and altitude maintenance while orbiting the Moon.

physics search of life outside earth space research and satellites artificial satellites space missions and artificial satellites

  1. tripropellent

  2. bipropellant

  3. two star sensors

  4. none of the above

Show answer
Correct Option: B
Explanation:

 The Chandrayaan used a bipropellant  integrating propulsion system to reach lunar orbit as well as orbit and altitude maintenance while operating the Moon. The power plant consisted of one 440 N engine and eight 220 thrusters. Fuel and oxidiser were stored in two tanks of 390 litres each.

The Chandrayaan was mainly powered by its solar array, which included one solar panel covering a total area of 2.15 x 1.8 m generating 750 W of peak power, which was stored in a_____________ for use during eclipses.

physics search of life outside earth space research and satellites artificial satellites space missions and artificial satellites

  1. cadmium zinc battery

  2. lead ion battery

  3. 36 Ah lithium-ion battery

  4. none of the above

Show answer
Correct Option: C
Explanation:

The Chandrayaan was mainly powered by its solar array, which included one solar panel covering a total area of 2.15 x 1.8 m generating 750 W of peak power, which was stored in a 36 Ah lithium-ion battery for use during eclipses.

The angular resolution of a 10cm diameter telescope at a wavelength of $5000 A^0$ is of the order of -

physics observing space: telescopes space research and satellites space travel space exploration and forms of light

  1. $10^{4} rad$

  2. $10^{-6} rad$

  3. $10^{6} rad$

  4. $10^{2} rad$

Show answer
Correct Option: B
Explanation:

Given parameters are,

Wavelength $\lambda = 5000\ A^{\circ}$

 = $5000 \times 10^{-10}$

Diameter of telescope, $D = 10 cm = 0.1 m$

Now, Angular resolution (d\theta) formula for telescope is,

$d\theta =\dfrac{1.22 \lambda}{D}\\$

Substituting the values, we get

$\Rightarrow d\theta = \dfrac{1.22 \times 5000 \times 10^{-10}}{0.1}= 6.1 \times 10^{-6}\\$

Clearly it is having significance order of $10^{-6}$.

Thus option B is correct.

An observer looks at a distant tree of height $10$ m with a telescope magnifying power of $20$. To the observer, the top appears

physics observing space: telescopes space research and satellites space travel space exploration and forms of light

  1. 10 times taller

  2. 10 times nearer

  3. 20 times taller

  4. 20 times nearer

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Correct Option: D

The focal length of eye lens and object lens of a telescope is 4 mm and 4 cm respectively. If final image of an far object is at $\infty $. Then the magnifying power and length of the tube are :

physics observing space: telescopes space research and satellites space travel space exploration and forms of light

  1. 10, 4.4 cm

  2. 4, 44 cm

  3. 44,10 cm

  4. 10, 44 cm

Show answer
Correct Option: A
Explanation:

Answer is A.

Magnification is the amount that a telescope enlarges its subject. Its equal to the telescopes focal length divided by the eyepieces focal length. As a rule of thumb, a telescopes maximum useful magnification is 50 times its aperture in inches (or twice its aperture in millimeters). 
That is, M = fo / fe
In this case, the focal length of eye lens and object lens of a telescope is 4 mm = 0.4 cm and 4 cm respectively.
So, Magnification M = fo / fe = 4 / 0.4 = 10.
Focal length of the eyepiece is the distance from the center of the eyepiece lens to the point at which light passing through the lens is brought to a focus.
Focal length of the objective is the distance from the center of the objective lens (or mirror) to the point at which incoming light is brought to a focus.
The length of the tube is given as sum of the focal lengths of the eye lens and the object lens.
So, Length of the tube  = fo + fe = 4 + 0.4 = 4.4 cm.
Hence, the magnifying power and length of the tube are: 10, 4.4 cm.

Which of the following is correct about astronomical telescope?

physics observing space: telescopes space research and satellites space travel space exploration and forms of light

  1. It consists of two diverging lenses

  2. Its objective is a concave lens

  3. Its eyepiece is a convex lens with greater focal length than the objective

  4. The final image in this telescope is inverted

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Correct Option: D
Explanation:

Since in astronomical telescopes we are not much bothered about the inverted carterer. So, we get final image in this telescope is inverted where in terrestrial, we get upright image.

Telescopic aids are used:

physics observing space: telescopes space research and satellites space travel space exploration and forms of light

  1. to view planets and other astronomical activities

  2. to view chalkboards and class demonstrations

  3. for performing computational tasks

  4. helps visuaaly challenged people in reading and writing

Show answer
Correct Option: A
Explanation:

Telescopic aids comes under optical aids.Telescopic aids are available to view chalkboards and class demonstrations