In which region of electromagnetic spectrum does the Lyman series of hydrogen atom lie ?

The entire range of the electromagnetic spectrum spans a large spectrum of wave lengths varying from:

A

10^-10 to 10⁶ m

B

10^-8 to 10⁶ m

C

10^-10 to 10¹⁰ m

D

10^-8 to 10⁸ m

হাইড্রোজেন বর্ণালীর কোন সিরিজটি UV অঞ্চলে পড়ে? (Which one of the following series of hydrogen spectrum falls in the UV region?)

A

লাইমেন (Lyman)

B

বামার (Balmer)

C

প্যাশ্চেন (Paschen)

D

ব্র্যাকেট (Brackett)

The oxygen atom is ________ times heavier than the hydrogen atom.

A

2

B

8

C

16

D

32

RH রিডবার্গ ধ্রুবক হলে, হাইড্রোজেন বর্ণালির বামার সিরিজের ২য় লাইনের তরঙ্গদৈর্ঘ্য কত হবে? ( If RH is the Rydberg constant, what will be the wavelength of the 2nd line in the Balmer series of hydrogen spectrum?)

A

36RH5

B

163RH

C

3RH16

D

536RH

তড়িৎচুম্বকীয় বর্ণালিতে (electromagnetic spectrum) নিচের কোনটির তরঙ্গদৈর্ঘ্য সবচেয়ে বেশি?

A

UV-ray

B

X-ray

C

TV-waves

D

Infrared ray

Electromagnetic spectrum contains:

A

Gamma rays (wave length -10 m)

B

Ultraviolet rays (wave length -6 m)

C

Infrared rays (wave length -4 m)

D

All of these

The range of electromagnetic spectrum important in heat transfer by radiation is __________ microns.

A

0.38-0.78

B

0.5-50

C

100-1000

D

5-50

To tell a lie is great sin. We_die than tell a lie.

A

have hetter

B

would rather

C

should

D

have to

Why does'nt the hydrogen atom emit X-rays?

A

It is very small in size

B

It has only one electron

C

Its energy levels are very close to each other

D

it is highly electropositive

As an atom absorbs energy, ........ increases and the atom is said to be excited.

A

as its energy level

B

it is energy level

C

the energy level of it

D

the energy level

In which region of electromagnetic spectrum does the Lyman series of hydrogen atom lie ?

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