Question 15: In a Compton scattering experiment, an electron is accelerated straight in the direction of incident x-ray photon. Which way does the scattered photon…
Here are some explanatory notes that can help us better understand the problem of twin paradox. Alternative method for finding the age of Zarak:Zarak’s age…
ٹون پیراڈوکس دس سال پہلے آپ نے موٹرسايیکل خریدی تھی جو کہ بدقسمتی سے اتنی اچھی نہیں تھی اور گزرے دس سالوں میں آپ نے…
Question 14: A beam of red light and a beam of blue light have exactly the same energy. Which light contains the greater number of…
Question 16: Why must the rest mass of photon be zero? ANSWER Photon is energy particle moving with the velocity of light. If it has…
Question 11: When a particle’s K.E increases, what happens to its de’ Broglie’s wavelength? ANSWER de’ Broglie’s wavelength associated with a moving particle like electron…
Question 17: What happens to the total radiations from the black body if its absolute temperature is doubled? ANSWER Let T is the temperature of…
Question 18: Why do not we observe Compton Effect with visible light? ANSWER Visible light photon possesses less energy, less momentum and less penetrating power.…
Question 19: If the following particles all have the same K.E, which has the shortest wavelength? Electron, alpha particle, neutron and photon. ANSWER We know…
Question 2: Both Zarak and Samina are twenty years old. Zarak leaves earth in a spacecraft moving at 0.8 c while Samina remains on the…