Q.38 Which one of the following gas is the lasing or active medium in the laser tube?
A) Hydrogen C) Neon
A) Hydrogen C) Neon
B) Helium D) Carbon dioxide
Q.39 The target of X¬ray tube is made up of which metal?
A) Iron C) Brass
B) Nickel D) Tungsten
Q.40 The Xrays consists of:
A) High energy proton C) High energy γ-rays
B) High energy electrons D) High energy photons
A) Iron C) Brass
B) Nickel D) Tungsten
Q.40 The Xrays consists of:
A) High energy proton C) High energy γ-rays
B) High energy electrons D) High energy photons
Q.42 The continuous spectrum of Xray is formed due to:
A) Characteristics of X-rays C) Soft X-ray
A) Characteristics of X-rays C) Soft X-ray
B) Bremsstrahlung X-ray D) Hard X-ray