Two waves A and B have wavelength of 0.01$\overset{\circ }{\mathop{A}}\,$ and 9000$\overset{\circ }{\mathop{A}}\,$respectivelyName the two waves.(b) Compare the speeds of these waves when they travel in a vacuum.

Two waves A and B have wavelength of 0.01$\overset{\circ }{\mathop{A}}\,$ and 9000$\overset{\circ }{\mathop{A}}\,$respectively
Name the two waves.
(b) Compare the speeds of these waves when they travel in a vacuum.

Class 10 | ICSE | Physics | Selina | Spectrum

Two waves A and B have wavelength of 0.01$\overset{\circ }{\mathop{A}}\,$ and 9000$\overset{\circ }{\mathop{A}}\,$respectively
Name the two waves.
(b) Compare the speeds of these waves when they travel in a vacuum.

(a) Gamma rays and infrared radiations (Wave A and B).

(b) In vacuum, all electromagnetic waves travel at the speed of light. In a vacuum, the ratio of these waves’ velocity is 1: 1.

i

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A …… lens is used to correct myopia and a ….. lens is used to correct hypermetropia.
A Concave, concave
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(A) active mass
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(C) atomic weight
(D) equivalent weight

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