Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 9 Answered

what is the momentum of a photon of frequency f , wavelength lembda.
Asked by | 21 Aug, 2008, 07:44: AM
answered-by-expert Expert Answer

momentum of  photon in terms of

frequency = hf / c

wavelength = h / λ

Answered by | 21 Aug, 2008, 09:45: AM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test Subjective Questions Webinar Subjective Questions Pre Board Assessment
Answered Unanswered My Questions My Answers
CBSE 9 - Physics
Which of the following is more compressible sand clay or dough
Asked by indrajeetghogare | 04 Jun, 2023, 01:44: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
if u is an initial velocity v is final velocity of body and t is time taken by boddy to attain a velocity from u to v then find the value of acceleration A
Asked by Anushkamishra385123 | 14 May, 2023, 12:39: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
can velocity be constant with acceleration?
Asked by adityatripathi84418 | 02 May, 2023, 10:29: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
A boy throws a steel ball straight up. Consider the motion of the ball only after it has left the boy's hand but before it touches the ground and assume that forces exerted by the air are negligible. For these conditions, the force(s) acting on the ball is (are): a. A downward force of gravity along with a steadily decreasing upward force b. A steadily decreasing upward force from the moment it leaves the boy's hand until it reaches its highest point on the way down there is a steadily increasing downward force of gravity as the object gets closer to the earth c. Constant downward force of gravity along with an upward force that steadily decreases until the ball reaches it highest point on the way down there is only a constant downward force of gravity d. Constant downward force of gravity only
Asked by harshsrivastava8896606 | 17 Apr, 2023, 01:47: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
For electric power transmission, copper or aluminium wire is used?
Asked by pramilam | 18 Mar, 2023, 08:54: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
What is the SI Unit of "Intensity of Sound"?
Asked by manaskumarbiswasbrb | 04 Feb, 2023, 08:35: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
explain human ear with lable diagram
Asked by sm6878261 | 12 Jan, 2023, 07:42: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
What is sound 
Asked by ahirejay2020 | 07 Jan, 2023, 10:41: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
why pressure increases with depth in fluid
Asked by sknv159357 | 05 Jan, 2023, 08:29: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
An object starts from rest and travels 20m in first 2 s and 160 m in 4 s . Find its velocity 7 s after the start .
Asked by asyadav1230 | 20 Dec, 2022, 07:17: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt