You visited us 20 times! Enjoying our articles? Unlock Full Access!

Atmospheric Refraction

Three observe...

Question

Three observers $A, B$ and $C$ measure the speed of light coming from a source to be $v_{A}, v_{B}$ and $v_{C}$ . The observer $A$ moves towards the source and $C$ moves away from the source at the same speed. The observer $B$ stays stationary. The surrounding space is vacuum everywhere.

v_{A} > v_{B} > v_{C}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

v_{A} < v_{B} < v_{C}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

v_{A} = v_{B} = v_{C}

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

v_{A} = v_{B} > v_{C}

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct options are
C $v_{A} = v_{B} = v_{C}$
D $v_{A} = v_{B} > v_{C}$
Relativity states that the speed of light in vacuum will be same independent of the frame of reference. The frame of reference can be stationary or moving.
So all three will find the speed of light to be $c$
Also $c = \frac{1}{2} (c + c)$
So, (C) and (D) are correct.

Suggest Corrections

Similar questions

Q. Three observers A, B and C measure the speed of light coming from a source to be ν_A, ν_B and ν_C. A moves towards the source and C moves away from the source at the same speed. B remains stationary. The surrounding space is vacuum everywhere.
(a)

ν_{A} > ν_{B} > ν_{C}

(b)

ν_{A} < ν_{B} < ν_{C}

(c)

ν_{A} = ν_{B} = ν_{C}

(d)

ν_{B} = \frac{1}{2} (ν_{A} + ν_{C})

Q. Three observers

A, B

and

C

measure the speed of light coming from a source as

v_{A}, v_{B}

and

v_{C}

. Observer

A

moves towards the source,

C

moves away from source and

B

stays stationary. The surrounding medium is water. If A and C are moving at the same speed, then

Q. Compare the speed of the three particles

A, B

and

C

as per the distance-time graph shown below.

Q. Choose the correct relation regarding potential. Here A, B, C and D all are at equal distance from point O, figure. Then ( Assume the dipole to be short)

Choose the correct relation regarding potential of an electric dipole. Here A, B, C and D all are at equal distance from point O which is much larger than the dimensions of the dipole. Then

Join BYJU'S Learning Program

Three observers A,B and C measure the speed of light coming from a source to be vA,vB and vC. The observer A moves towards the source and C moves away from the source at the same speed. The observer B stays stationary. The surrounding space is vacuum everywhere.

The correct options are C vA=vB=vC D vA=vB>vCRelativity states that the speed of light in vacuum will be same independent of the frame of reference. The frame of reference can be stationary or moving.So all three will find the speed of light to be cAlso c=12(c+c)So, (C) and (D) are correct.

Three observers $A, B$ and $C$ measure the speed of light coming from a source to be $v_{A}, v_{B}$ and $v_{C}$ . The observer $A$ moves towards the source and $C$ moves away from the source at the same speed. The observer $B$ stays stationary. The surrounding space is vacuum everywhere.