Modern Physics

A. v = 3 ×× 106 ms-1
B. v = 2 ×× 10 ms-1
C. v = 2 ×× 6 ms-1
D. v = 2 ×× 106 ms-1

A. 5.53 x 10-36kg
B. 0 kg.
C. 2.46 x 10-36kg
D. 1.84 x 10-44kg

A. p
B. n
C. 0
D. None

A. Zero
B. Double
C. Half
D. 1

A. The maximum kinetic energy of the photoelectrons increases
B. The minimum kinetic energy of the photoelectrons decreases
C. The minimum kinetic energy of the photoelectrons increases
D. The average kinetic energy of the photoelectrons decreases

A. Becomes double
B. Remains same
C. Becomes half
D. First increases then decrease because of the curvilinear graph

A. Increases because wavelength decreases
B. Decreases because speed decreases
C. Remains same
D. Increases then decrease

A. λ
B. Speed of sound
C. Speed of lightB.
D. h

A. 103 photons of wavelength 2 pm (γ-rays)
B. 102 photons of wavelength 1nm (x-rays)
C. 106 photons of wavelength 50?m (infrared)
D. 106 photons of wavelength 200nm (UV)

A. A unit of energy
B. A positively charged particle
C. A quantum of electromagnetic radiation
D. A unit of wavelength