1000+ NEET Important Questions and Answers Pdf - 2

Question: 6

According to relativity, the length of a rod in motion ____

(A) is less than its rest length

(B) may be more or less than or equal to rest length depending on the speed of the rod

(C) is more than its rest length

(D) is same as its rest length

Question: 7

Wave theory of light assumed that ______ medium pervaded all space in the universe.

(A) rare gas

(B) air

(C) ether

(D) vacuum

Question: 8

According to quantum theory is emitted in the form of discrete packets of energy called

(A) quanta

(B) photons

(C) protons

(D) both a and b

Question: 9

According to special theory of relativity in all frames of reference the laws of physics are

(A) different and the velocity of light in free space is different

(B) same and the velocity of light in free space is constant

(C) different and the velocity of light in free space is same

(D) same and velocity of light in free space is different

Question: 10

Photon has

(A) mass but no energy

(B) zero mass and has energy

(C) zero mass and energy

(D) infinite mass and energy