Which of the following is the infrared wavelength?

10^{- 4} c m

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10^{- 5} c m

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10^{- 6} c m

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10^{- 7} c m

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Solution

The correct option is A $10^{- 4} c m$
The wavelength of infrared region is $8 \times 10^{- 5} c m$ to $3 \times 10^{- 3} c m$ . So maximum wavelength of infrared region $= 8 \times 10^{- 5} c m \approx 10^{- 4} c m$ .

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State True or False.

Gamma rays are electromagnetic radiations of wavelengths of

10^{- 6} c m

10^{- 5} c m

Three cuboids of dimensions $5 c m \times 6 c m \times 7 c m, 4 c m \times 7 c m \times 8 c m \times$ and $2 c m \times 3 c m \times 13 c m$ are melted and a cube is made. Find the of cube.

A B C D

is a quadrilateral such that

A B = 5 c m, B C = 4 c m; C D = 7 c m, A D = 6 c m

and diagonal

B D = 5 c m

, then the

A (□ A B C D)

4 (3 + \sqrt{6}) c m^{2}

Q. Three cuboids of dimensions

5 c m \times 6 c m \times 7 c m, 4 c m \times 7 c m \times 8 c m a n d \times 2 c m \times 3 c m \times 13 c m

are melted and a cube is made. Find the edge of the cube.

In $Δ A B C$ , AB = 4 cm, BC = 5 cm, AC = 6 cm. In $Δ P Q R$ , PQ = 4 cm, QR = 5 cm, PR = 6 cm. Which of the following is true?

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Which of the following is the infrared wavelength?

The correct option is A 10−4cmThe wavelength of infrared region is 8×10−5cm to 3×10−3cm. So maximum wavelength of infrared region =8×10−5cm≈10−4cm.

The correct option is A $10^{- 4} c m$
The wavelength of infrared region is $8 \times 10^{- 5} c m$ to $3 \times 10^{- 3} c m$ . So maximum wavelength of infrared region $= 8 \times 10^{- 5} c m \approx 10^{- 4} c m$ .