Tag: physics

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Questions Related to physics

Multiple choice conditions for a light ray to pass undeviated refraction of light at plane surfaces physics

If any two media are optically exactly the same then; when light passes from one medium to another then:

  1. No bending occurs

  2. Sometimes it can bend

  3. Compete bending occurs

  4. None
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Since, both media are optically same, there is no difference in the absolute refractive indices of the two media.

        Hence, light passes through them undeviated that is no bending occurs.

Answer-(A)

Multiple choice physics universe and space science human beings in space our pride - iii our scientist

Which of the instruments used in chandrayaan were not indegenously built?

  1. HEX

  2. LLRI

  3. SIR-2

  4. MIP
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Spectrometer Infrared -2 (SIR-2) is an infrared spectrometer build for remote sensing of the lunar surface. SIR-2 represents german scientific contribution to the Indian chandrayaan lunar mission. The project is funded by the Max Planck society and partly by European space agency.

Multiple choice physics universe and space science human beings in space our pride - iii our scientist

Among the following which is not the achievements of Chandrayaan-1.

  1. The discovery of the wide-spread presence of water molecules in lunar soil.

  2. Chandrayaans Moon Mineralogy Mapper has confirmed that moon was once completely molten.

  3. It has provided high-resolution spectral data on the mineralogy of the moon.

  4. Chandrayaan-1 has discovered large caves on the Mars surface that can act as a human shelter on the Mars.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Chandrayaan- 1 was first Indian Planetary mission to moon. So option D is incorrect as it says information about Mars Surface. Hence it is incorrect.

All the statements given in option A, B and C are correct.

Multiple choice physics reflection of light and shadow regular and irregular reflection regular and diffused reflection laws of reflection

You are given four sources of light each one providing a light of a single colour red, blue, green and yellow. Suppose the angle of refraction for a beam of yellow light corresponding to a particular angle of incidence at the interface of two media is 90. Which of the following statements is correct, if the source of yellow light is replaced with that of other lights without changing the angle of incidence?

  1. The beam of red light would undergo total internal reflection.

  2. The beam of red light would bend towards normal while it gets refracted through the second medium.

  3. The beam of blue light would undergo total internal reflection.

  4. The beam of green light would bend away from the normal as it gets refracted through the second medium.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

For yellow light, r=90$^{\circ}$, when $i=c$ since $i$ is kept $c$ should be smaller for total reflection

$\mu = \cfrac{1}{\sin{c}}$ 
If $c$ is small, $\mu$ will be large.
$\therefore c $ will be smallest for this colour.
Hence, blue colour will undergo total internal reflection.