Tag: physics

Questions Related to physics

CV Raman got the Nobel Prize for his experiment on :

physics the human eye and the colourful world scattering of light and its applications some natural phenomena of light effects of light

  1. Dispersion of Light

  2. Reflection of Light

  3. Deflection of Light

  4. Scattering of Light

Show answer
Correct Option: D
Explanation:

C. V. Raman got noble prize for his free, transparent sample of a chemical compound, a small fraction of the light emerges in directions other than that of the incident (incoming) beam. Here it is all about scattering of light.

It is very difficult to see through fog because

physics optics scattering of light and its applications some natural phenomena of light effects of light

  1. of scattering of light

  2. of total internal reflection

  3. fog is good absorber of light

  4. refractive index offog is very large

Show answer
Correct Option: A
Explanation:

Scattering is a phenomenon of forcing the deviation of light ray from its regular trajectory.Hence visibility in fog is less.

Stokes and antistokes line observed in Raman scattering is due to ________ of light.

physics optics scattering of light and its applications some natural phenomena of light effects of light

  1. reflection

  2. inelastic scattering

  3. elastic scattering

  4. dispersion

Show answer
Correct Option: B
Explanation:

Stokes and antistokes line observed in Raman scattering is due to the inelastic scattering of light.

In Raman scattering, Stokes and Antistokes lines respectively represents lines with ______ and _____ wavelength

physics optics scattering of light and its applications some natural phenomena of light effects of light

  1. Low, High

  2. High, High

  3. High, Low

  4. Low, Low

Show answer
Correct Option: C
Explanation:

In raman scattering stokes lines are the high wavelength & antistokes have least wavelength in the scattered light.

In Raman effect, the wavelength of the incident radiation is $5890\overset{o}{A}$. The wavelengths of Stocks and anti-stocks lines are respectively.

physics optics scattering of light and its applications some natural phenomena of light effects of light

  1. $5880\overset{o}{A}$ and $5900\overset{o}{A}$

  2. $5900\overset{o}{A}$ and $5880\overset{o}{A}$

  3. $5900\overset{o}{A}$ and $5910\overset{o}{A}$

  4. $5870\overset{o}{A}$ and $5880\overset{o}{A}$

Show answer
Correct Option: B
Explanation:

Incident wavelength=$5890 A^{0}$

  • Stocks  lines have wavelength more than the incident radiation
$\lambda _{s}>$ incident wavelength
  • Anti stocks lines have wavelength less than incident radiation
$\lambda _{as}<$ incident wavelength
So the correct option is B

Antistokes lines is Raman scattering are the lines of ________ frequency and __________ wavelength.

physics optics scattering of light and its applications some natural phenomena of light effects of light

  1. Low, low

  2. Low, high

  3. High, high

  4. High, low

Show answer
Correct Option: D
Explanation:

Antistokes lines is Raman scattering are the lines of high frequency and low wavelength.

 what is the difference in the masses of the pieces,$m _1=20.17 g $ ,$m _2=20.15 g?$(upto two decimal places)

physics along with motion what forces can do? force and it's unit force and its effects

  1. $0.02 g$

  2. $0.021 g$

  3. $0.022 g$

  4. $0.024 g$

Show answer
Correct Option: A
Explanation:

Difference in masses
= $m _2 - m _1$ = $20.17 g -20.15 g$
$=0.02 g$ (correct upto two places of decimal)

For a surface molecule,

physics along with motion what forces can do? force and it's unit force and its effects

  1. the net force on it is non zero

  2. the net force on it zero

  3. there is net downward force

  4. there is net upward force

Show answer
Correct Option: C
Explanation:

A surface molecule experiences a net downward force.

An iron block of sides $50 cm\times 8 cm\times 15 cm$ has to be pushed along the floor. The force required will be minimum when the surface in contact with ground is

physics along with motion what forces can do? force and it's unit force and its effects

  1. $8 cm\times 15 cm $surface

  2. $50 cm\times 15 cm $surface

  3. $8 cm\times 50 cm $surface

  4. Force is same for all surfaces.

Show answer
Correct Option: D
Explanation:

Force will be same for all the surfaces.
Hence, the correct option is $(D)$

Fill in the blanks:

The force responsible for changing the state of motion of a moving object in contact between surface is the _______.

physics along with motion what forces can do? force and it's unit force and its effects

  1. non-contact force

  2. force of friction

  3. magnetic force

  4. muscular force

Show answer
Correct Option: B
Explanation:

The friction force is the force exerted by a surface an object moving across it. It acts in a direction to oppose the relative motion between objects.